From 5ee13e6c65276fe03d9fd82aaf870d99cc9c7256 Mon Sep 17 00:00:00 2001
From: Jessica Del <Jessica.Del@amd.com>
Date: Tue, 20 Dec 2022 12:04:46 +0100
Subject: [PATCH] [AMDGPU] Wide multiplies tests for D140208

These tests show suboptimal code generation that will
be improved by the changes in D140208
---
 .../AMDGPU/GlobalISel/mul-known-bits.i64.ll        | 539 +++++++++++++++++++++
 1 file changed, 539 insertions(+)
 create mode 100644 llvm/test/CodeGen/AMDGPU/GlobalISel/mul-known-bits.i64.ll

diff --git a/llvm/test/CodeGen/AMDGPU/GlobalISel/mul-known-bits.i64.ll b/llvm/test/CodeGen/AMDGPU/GlobalISel/mul-known-bits.i64.ll
new file mode 100644
index 0000000..3d63978
--- /dev/null
+++ b/llvm/test/CodeGen/AMDGPU/GlobalISel/mul-known-bits.i64.ll
@@ -0,0 +1,539 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN:  llc -march=amdgcn -mcpu=gfx1010 -global-isel=1 -verify-machineinstrs < %s | FileCheck -allow-deprecated-dag-overlap -check-prefixes=GFX10 %s
+; RUN:  llc -march=amdgcn -mcpu=gfx1100 -global-isel=1 -verify-machineinstrs < %s | FileCheck -allow-deprecated-dag-overlap -check-prefixes=GFX11 %s
+declare i32 @llvm.amdgcn.workitem.id.x()
+
+; A 64-bit multiplication where no arguments were zero extended.
+define amdgpu_kernel void @v_mul_i64_zext_00(ptr addrspace(1) %out, ptr addrspace(1) %aptr, ptr addrspace(1) %bptr) nounwind {
+; GFX10-LABEL: v_mul_i64_zext_00:
+; GFX10:       ; %bb.0:
+; GFX10-NEXT:    s_load_dwordx4 s[0:3], s[0:1], 0x2c
+; GFX10-NEXT:    v_lshlrev_b32_e32 v6, 3, v0
+; GFX10-NEXT:    s_waitcnt lgkmcnt(0)
+; GFX10-NEXT:    s_clause 0x1
+; GFX10-NEXT:    global_load_dwordx2 v[0:1], v6, s[0:1]
+; GFX10-NEXT:    global_load_dwordx2 v[2:3], v6, s[2:3]
+; GFX10-NEXT:    s_waitcnt vmcnt(0)
+; GFX10-NEXT:    v_mad_u64_u32 v[4:5], s0, v0, v2, 0
+; GFX10-NEXT:    v_mul_lo_u32 v0, v0, v3
+; GFX10-NEXT:    v_mul_lo_u32 v1, v1, v2
+; GFX10-NEXT:    v_add3_u32 v5, v5, v0, v1
+; GFX10-NEXT:    global_store_dwordx2 v6, v[4:5], s[2:3]
+; GFX10-NEXT:    s_endpgm
+;
+; GFX11-LABEL: v_mul_i64_zext_00:
+; GFX11:       ; %bb.0:
+; GFX11-NEXT:    s_load_b128 s[0:3], s[0:1], 0x2c
+; GFX11-NEXT:    v_lshlrev_b32_e32 v6, 3, v0
+; GFX11-NEXT:    s_waitcnt lgkmcnt(0)
+; GFX11-NEXT:    s_clause 0x1
+; GFX11-NEXT:    global_load_b64 v[0:1], v6, s[0:1]
+; GFX11-NEXT:    global_load_b64 v[2:3], v6, s[2:3]
+; GFX11-NEXT:    s_waitcnt vmcnt(0)
+; GFX11-NEXT:    v_mad_u64_u32 v[4:5], null, v0, v2, 0
+; GFX11-NEXT:    v_mul_lo_u32 v0, v0, v3
+; GFX11-NEXT:    v_mul_lo_u32 v1, v1, v2
+; GFX11-NEXT:    s_delay_alu instid0(VALU_DEP_1)
+; GFX11-NEXT:    v_add3_u32 v5, v5, v0, v1
+; GFX11-NEXT:    global_store_b64 v6, v[4:5], s[2:3]
+; GFX11-NEXT:    s_sendmsg sendmsg(MSG_DEALLOC_VGPRS)
+; GFX11-NEXT:    s_endpgm
+  %tid = call i32 @llvm.amdgcn.workitem.id.x()
+  %gep.a = getelementptr inbounds i64, ptr addrspace(1) %aptr, i32 %tid
+  %gep.b = getelementptr inbounds i64, ptr addrspace(1) %bptr, i32 %tid
+  %gep.out = getelementptr inbounds i64, ptr addrspace(1) %bptr, i32 %tid
+  %a = load i64, ptr addrspace(1) %gep.a
+  %b = load i64, ptr addrspace(1) %gep.b
+  %mul = mul i64 %a, %b
+  store i64 %mul, ptr addrspace(1) %gep.out
+  ret void
+}
+
+; a 64 bit multiplication where the second argument was zero extended.
+define amdgpu_kernel void @v_mul_i64_zext_01(ptr addrspace(1) %out, ptr addrspace(1) %aptr, ptr addrspace(1) %bptr) {
+; GFX10-LABEL: v_mul_i64_zext_01:
+; GFX10:       ; %bb.0:
+; GFX10-NEXT:    s_clause 0x1
+; GFX10-NEXT:    s_load_dwordx4 s[4:7], s[0:1], 0x24
+; GFX10-NEXT:    s_load_dwordx2 s[2:3], s[0:1], 0x34
+; GFX10-NEXT:    v_lshlrev_b32_e32 v2, 3, v0
+; GFX10-NEXT:    v_lshlrev_b32_e32 v3, 2, v0
+; GFX10-NEXT:    s_waitcnt lgkmcnt(0)
+; GFX10-NEXT:    global_load_dwordx2 v[0:1], v2, s[6:7]
+; GFX10-NEXT:    global_load_dword v4, v3, s[2:3]
+; GFX10-NEXT:    s_waitcnt vmcnt(0)
+; GFX10-NEXT:    v_mad_u64_u32 v[2:3], s0, v0, v4, 0
+; GFX10-NEXT:    v_mul_lo_u32 v0, v1, v4
+; GFX10-NEXT:    v_add_nc_u32_e32 v3, v3, v0
+; GFX10-NEXT:    v_mov_b32_e32 v0, 0
+; GFX10-NEXT:    global_store_dwordx2 v0, v[2:3], s[4:5]
+; GFX10-NEXT:    s_endpgm
+;
+; GFX11-LABEL: v_mul_i64_zext_01:
+; GFX11:       ; %bb.0:
+; GFX11-NEXT:    s_clause 0x1
+; GFX11-NEXT:    s_load_b128 s[4:7], s[0:1], 0x24
+; GFX11-NEXT:    s_load_b64 s[0:1], s[0:1], 0x34
+; GFX11-NEXT:    v_lshlrev_b32_e32 v1, 3, v0
+; GFX11-NEXT:    v_lshlrev_b32_e32 v2, 2, v0
+; GFX11-NEXT:    s_waitcnt lgkmcnt(0)
+; GFX11-NEXT:    global_load_b64 v[0:1], v1, s[6:7]
+; GFX11-NEXT:    global_load_b32 v4, v2, s[0:1]
+; GFX11-NEXT:    s_waitcnt vmcnt(0)
+; GFX11-NEXT:    v_mad_u64_u32 v[2:3], null, v0, v4, 0
+; GFX11-NEXT:    v_mul_lo_u32 v0, v1, v4
+; GFX11-NEXT:    s_delay_alu instid0(VALU_DEP_1)
+; GFX11-NEXT:    v_dual_mov_b32 v0, 0 :: v_dual_add_nc_u32 v3, v3, v0
+; GFX11-NEXT:    global_store_b64 v0, v[2:3], s[4:5]
+; GFX11-NEXT:    s_sendmsg sendmsg(MSG_DEALLOC_VGPRS)
+; GFX11-NEXT:    s_endpgm
+  %tid = call i32 @llvm.amdgcn.workitem.id.x()
+  %gep.a = getelementptr inbounds i64, ptr addrspace(1) %aptr, i32 %tid
+  %gep.b = getelementptr inbounds i32, ptr addrspace(1) %bptr, i32 %tid
+  %a = load i64, ptr addrspace(1) %gep.a
+  %b = load i32, ptr addrspace(1) %gep.b
+  %b_ext = zext i32 %b to i64
+  %mul = mul i64 %a, %b_ext
+  store i64 %mul, ptr addrspace(1) %out
+  ret void
+}
+
+; 64 bit multiplication where the first argument was zero extended.
+define amdgpu_kernel void @v_mul_i64_zext_10(ptr addrspace(1) %out, ptr addrspace(1) %aptr, ptr addrspace(1) %bptr) {
+; GFX10-LABEL: v_mul_i64_zext_10:
+; GFX10:       ; %bb.0:
+; GFX10-NEXT:    s_clause 0x1
+; GFX10-NEXT:    s_load_dwordx4 s[4:7], s[0:1], 0x24
+; GFX10-NEXT:    s_load_dwordx2 s[2:3], s[0:1], 0x34
+; GFX10-NEXT:    v_lshlrev_b32_e32 v2, 2, v0
+; GFX10-NEXT:    v_lshlrev_b32_e32 v3, 3, v0
+; GFX10-NEXT:    s_waitcnt lgkmcnt(0)
+; GFX10-NEXT:    global_load_dword v4, v2, s[6:7]
+; GFX10-NEXT:    global_load_dwordx2 v[0:1], v3, s[2:3]
+; GFX10-NEXT:    s_waitcnt vmcnt(0)
+; GFX10-NEXT:    v_mad_u64_u32 v[2:3], s0, v4, v0, 0
+; GFX10-NEXT:    v_mul_lo_u32 v1, v4, v1
+; GFX10-NEXT:    v_mul_lo_u32 v0, 0, v0
+; GFX10-NEXT:    v_add3_u32 v3, v3, v1, v0
+; GFX10-NEXT:    v_mov_b32_e32 v0, 0
+; GFX10-NEXT:    global_store_dwordx2 v0, v[2:3], s[4:5]
+; GFX10-NEXT:    s_endpgm
+;
+; GFX11-LABEL: v_mul_i64_zext_10:
+; GFX11:       ; %bb.0:
+; GFX11-NEXT:    s_clause 0x1
+; GFX11-NEXT:    s_load_b128 s[4:7], s[0:1], 0x24
+; GFX11-NEXT:    s_load_b64 s[0:1], s[0:1], 0x34
+; GFX11-NEXT:    v_lshlrev_b32_e32 v1, 2, v0
+; GFX11-NEXT:    v_lshlrev_b32_e32 v0, 3, v0
+; GFX11-NEXT:    s_waitcnt lgkmcnt(0)
+; GFX11-NEXT:    global_load_b32 v4, v1, s[6:7]
+; GFX11-NEXT:    global_load_b64 v[0:1], v0, s[0:1]
+; GFX11-NEXT:    s_waitcnt vmcnt(0)
+; GFX11-NEXT:    v_mad_u64_u32 v[2:3], null, v4, v0, 0
+; GFX11-NEXT:    v_mul_lo_u32 v1, v4, v1
+; GFX11-NEXT:    v_mul_lo_u32 v0, 0, v0
+; GFX11-NEXT:    s_delay_alu instid0(VALU_DEP_1)
+; GFX11-NEXT:    v_add3_u32 v3, v3, v1, v0
+; GFX11-NEXT:    v_mov_b32_e32 v0, 0
+; GFX11-NEXT:    global_store_b64 v0, v[2:3], s[4:5]
+; GFX11-NEXT:    s_sendmsg sendmsg(MSG_DEALLOC_VGPRS)
+; GFX11-NEXT:    s_endpgm
+  %tid = call i32 @llvm.amdgcn.workitem.id.x()
+  %gep.a = getelementptr inbounds i32, ptr addrspace(1) %aptr, i32 %tid
+  %gep.b = getelementptr inbounds i64, ptr addrspace(1) %bptr, i32 %tid
+  %a = load i32, ptr addrspace(1) %gep.a
+  %b = load i64, ptr addrspace(1) %gep.b
+  %a_ext = zext i32 %a to i64
+  %mul = mul i64 %a_ext, %b
+  store i64 %mul, ptr addrspace(1) %out
+  ret void
+}
+
+; 64-bit multiplication where both arguments were zero extended.
+define amdgpu_kernel void @v_mul_i64_zext_11(ptr addrspace(1) %out, ptr addrspace(1) %aptr, ptr addrspace(1) %bptr) {
+; GFX10-LABEL: v_mul_i64_zext_11:
+; GFX10:       ; %bb.0:
+; GFX10-NEXT:    s_clause 0x1
+; GFX10-NEXT:    s_load_dwordx4 s[4:7], s[0:1], 0x24
+; GFX10-NEXT:    s_load_dwordx2 s[2:3], s[0:1], 0x34
+; GFX10-NEXT:    v_lshlrev_b32_e32 v0, 2, v0
+; GFX10-NEXT:    s_waitcnt lgkmcnt(0)
+; GFX10-NEXT:    s_clause 0x1
+; GFX10-NEXT:    global_load_dword v1, v0, s[6:7]
+; GFX10-NEXT:    global_load_dword v2, v0, s[2:3]
+; GFX10-NEXT:    s_waitcnt vmcnt(0)
+; GFX10-NEXT:    v_mad_u64_u32 v[0:1], s0, v1, v2, 0
+; GFX10-NEXT:    v_mul_lo_u32 v2, 0, v2
+; GFX10-NEXT:    v_add_nc_u32_e32 v1, v1, v2
+; GFX10-NEXT:    v_mov_b32_e32 v2, 0
+; GFX10-NEXT:    global_store_dwordx2 v2, v[0:1], s[4:5]
+; GFX10-NEXT:    s_endpgm
+;
+; GFX11-LABEL: v_mul_i64_zext_11:
+; GFX11:       ; %bb.0:
+; GFX11-NEXT:    s_clause 0x1
+; GFX11-NEXT:    s_load_b128 s[4:7], s[0:1], 0x24
+; GFX11-NEXT:    s_load_b64 s[0:1], s[0:1], 0x34
+; GFX11-NEXT:    v_lshlrev_b32_e32 v0, 2, v0
+; GFX11-NEXT:    s_waitcnt lgkmcnt(0)
+; GFX11-NEXT:    s_clause 0x1
+; GFX11-NEXT:    global_load_b32 v1, v0, s[6:7]
+; GFX11-NEXT:    global_load_b32 v2, v0, s[0:1]
+; GFX11-NEXT:    s_waitcnt vmcnt(0)
+; GFX11-NEXT:    v_mad_u64_u32 v[0:1], null, v1, v2, 0
+; GFX11-NEXT:    v_mul_lo_u32 v2, 0, v2
+; GFX11-NEXT:    s_delay_alu instid0(VALU_DEP_1)
+; GFX11-NEXT:    v_dual_mov_b32 v2, 0 :: v_dual_add_nc_u32 v1, v1, v2
+; GFX11-NEXT:    global_store_b64 v2, v[0:1], s[4:5]
+; GFX11-NEXT:    s_sendmsg sendmsg(MSG_DEALLOC_VGPRS)
+; GFX11-NEXT:    s_endpgm
+  %tid = call i32 @llvm.amdgcn.workitem.id.x()
+  %gep.a = getelementptr inbounds i32, ptr addrspace(1) %aptr, i32 %tid
+  %gep.b = getelementptr inbounds i32, ptr addrspace(1) %bptr, i32 %tid
+  %a = load i32, ptr addrspace(1) %gep.a
+  %b = load i32, ptr addrspace(1) %gep.b
+  %a_ext = zext i32 %a to i64
+  %b_ext = zext i32 %b to i64
+  %mul = mul i64 %a_ext, %b_ext
+  store i64 %mul, ptr addrspace(1) %out
+  ret void
+}
+
+; 64-bit multiplication where the upper bytes of the first argument were masked.
+define amdgpu_kernel void @v_mul_i64_and_a_hi(ptr addrspace(1) %out, ptr addrspace(1) %aptr, ptr addrspace(1) %bptr) {
+; GFX10-LABEL: v_mul_i64_and_a_hi:
+; GFX10:       ; %bb.0:
+; GFX10-NEXT:    s_clause 0x1
+; GFX10-NEXT:    s_load_dwordx4 s[4:7], s[0:1], 0x24
+; GFX10-NEXT:    s_load_dwordx2 s[2:3], s[0:1], 0x34
+; GFX10-NEXT:    v_lshlrev_b32_e32 v2, 3, v0
+; GFX10-NEXT:    s_waitcnt lgkmcnt(0)
+; GFX10-NEXT:    s_clause 0x1
+; GFX10-NEXT:    global_load_dword v4, v2, s[6:7]
+; GFX10-NEXT:    global_load_dwordx2 v[0:1], v2, s[2:3]
+; GFX10-NEXT:    s_waitcnt vmcnt(0)
+; GFX10-NEXT:    v_mad_u64_u32 v[2:3], s0, v4, v0, 0
+; GFX10-NEXT:    v_mul_lo_u32 v1, v4, v1
+; GFX10-NEXT:    v_mul_lo_u32 v0, 0, v0
+; GFX10-NEXT:    v_add3_u32 v3, v3, v1, v0
+; GFX10-NEXT:    v_mov_b32_e32 v0, 0
+; GFX10-NEXT:    global_store_dwordx2 v0, v[2:3], s[4:5]
+; GFX10-NEXT:    s_endpgm
+;
+; GFX11-LABEL: v_mul_i64_and_a_hi:
+; GFX11:       ; %bb.0:
+; GFX11-NEXT:    s_clause 0x1
+; GFX11-NEXT:    s_load_b128 s[4:7], s[0:1], 0x24
+; GFX11-NEXT:    s_load_b64 s[0:1], s[0:1], 0x34
+; GFX11-NEXT:    v_lshlrev_b32_e32 v0, 3, v0
+; GFX11-NEXT:    s_waitcnt lgkmcnt(0)
+; GFX11-NEXT:    s_clause 0x1
+; GFX11-NEXT:    global_load_b32 v4, v0, s[6:7]
+; GFX11-NEXT:    global_load_b64 v[0:1], v0, s[0:1]
+; GFX11-NEXT:    s_waitcnt vmcnt(0)
+; GFX11-NEXT:    v_mad_u64_u32 v[2:3], null, v4, v0, 0
+; GFX11-NEXT:    v_mul_lo_u32 v1, v4, v1
+; GFX11-NEXT:    v_mul_lo_u32 v0, 0, v0
+; GFX11-NEXT:    s_delay_alu instid0(VALU_DEP_1)
+; GFX11-NEXT:    v_add3_u32 v3, v3, v1, v0
+; GFX11-NEXT:    v_mov_b32_e32 v0, 0
+; GFX11-NEXT:    global_store_b64 v0, v[2:3], s[4:5]
+; GFX11-NEXT:    s_sendmsg sendmsg(MSG_DEALLOC_VGPRS)
+; GFX11-NEXT:    s_endpgm
+ %tid = call i32 @llvm.amdgcn.workitem.id.x()
+  %gep.a = getelementptr inbounds i64, ptr addrspace(1) %aptr, i32 %tid
+  %gep.b = getelementptr inbounds i64, ptr addrspace(1) %bptr, i32 %tid
+  %a = load i64, ptr addrspace(1) %gep.a
+  %b = load i64, ptr addrspace(1) %gep.b
+  %a_and = and i64 %a, u0x00000000FFFFFFFF
+  %mul = mul i64 %a_and, %b
+  store i64 %mul, ptr addrspace(1) %out
+  ret void
+}
+
+; 64-bit multiplication where lower bytes of first argument were masked.
+define amdgpu_kernel void @v_mul_i64_and_a_lo(ptr addrspace(1) %out, ptr addrspace(1) %aptr, ptr addrspace(1) %bptr) {
+; GFX10-LABEL: v_mul_i64_and_a_lo:
+; GFX10:       ; %bb.0:
+; GFX10-NEXT:    s_clause 0x1
+; GFX10-NEXT:    s_load_dwordx2 s[2:3], s[0:1], 0x34
+; GFX10-NEXT:    s_load_dwordx4 s[4:7], s[0:1], 0x24
+; GFX10-NEXT:    v_lshlrev_b32_e32 v4, 3, v0
+; GFX10-NEXT:    s_waitcnt lgkmcnt(0)
+; GFX10-NEXT:    s_clause 0x1
+; GFX10-NEXT:    global_load_dwordx2 v[0:1], v4, s[2:3]
+; GFX10-NEXT:    global_load_dwordx2 v[2:3], v4, s[6:7]
+; GFX10-NEXT:    s_waitcnt vmcnt(1)
+; GFX10-NEXT:    v_mad_u64_u32 v[4:5], s0, 0, v0, 0
+; GFX10-NEXT:    v_mul_lo_u32 v1, 0, v1
+; GFX10-NEXT:    s_waitcnt vmcnt(0)
+; GFX10-NEXT:    v_mul_lo_u32 v0, v3, v0
+; GFX10-NEXT:    v_add3_u32 v5, v5, v1, v0
+; GFX10-NEXT:    v_mov_b32_e32 v0, 0
+; GFX10-NEXT:    global_store_dwordx2 v0, v[4:5], s[4:5]
+; GFX10-NEXT:    s_endpgm
+;
+; GFX11-LABEL: v_mul_i64_and_a_lo:
+; GFX11:       ; %bb.0:
+; GFX11-NEXT:    s_clause 0x1
+; GFX11-NEXT:    s_load_b64 s[4:5], s[0:1], 0x34
+; GFX11-NEXT:    s_load_b128 s[0:3], s[0:1], 0x24
+; GFX11-NEXT:    v_lshlrev_b32_e32 v2, 3, v0
+; GFX11-NEXT:    s_waitcnt lgkmcnt(0)
+; GFX11-NEXT:    s_clause 0x1
+; GFX11-NEXT:    global_load_b64 v[0:1], v2, s[4:5]
+; GFX11-NEXT:    global_load_b64 v[2:3], v2, s[2:3]
+; GFX11-NEXT:    s_waitcnt vmcnt(1)
+; GFX11-NEXT:    v_mad_u64_u32 v[4:5], null, 0, v0, 0
+; GFX11-NEXT:    v_mul_lo_u32 v1, 0, v1
+; GFX11-NEXT:    s_waitcnt vmcnt(0)
+; GFX11-NEXT:    v_mul_lo_u32 v0, v3, v0
+; GFX11-NEXT:    s_delay_alu instid0(VALU_DEP_1)
+; GFX11-NEXT:    v_add3_u32 v5, v5, v1, v0
+; GFX11-NEXT:    v_mov_b32_e32 v0, 0
+; GFX11-NEXT:    global_store_b64 v0, v[4:5], s[0:1]
+; GFX11-NEXT:    s_sendmsg sendmsg(MSG_DEALLOC_VGPRS)
+; GFX11-NEXT:    s_endpgm
+  %tid = call i32 @llvm.amdgcn.workitem.id.x()
+  %gep.a = getelementptr inbounds i64, ptr addrspace(1) %aptr, i32 %tid
+  %gep.b = getelementptr inbounds i64, ptr addrspace(1) %bptr, i32 %tid
+  %a = load i64, ptr addrspace(1) %gep.a
+  %b = load i64, ptr addrspace(1) %gep.b
+  %a_and = and i64 %a, u0xFFFFFFFF00000000
+  %mul = mul i64 %a_and, %b
+  store i64 %mul, ptr addrspace(1) %out
+  ret void
+}
+
+; 64-bit multiplication where the lower bytes of the second argument were masked.
+define amdgpu_kernel void @v_mul_i64_and_b_lo(ptr addrspace(1) %out, ptr addrspace(1) %aptr, ptr addrspace(1) %bptr) {
+; GFX10-LABEL: v_mul_i64_and_b_lo:
+; GFX10:       ; %bb.0:
+; GFX10-NEXT:    s_clause 0x1
+; GFX10-NEXT:    s_load_dwordx4 s[4:7], s[0:1], 0x24
+; GFX10-NEXT:    s_load_dwordx2 s[2:3], s[0:1], 0x34
+; GFX10-NEXT:    v_lshlrev_b32_e32 v4, 3, v0
+; GFX10-NEXT:    s_waitcnt lgkmcnt(0)
+; GFX10-NEXT:    s_clause 0x1
+; GFX10-NEXT:    global_load_dwordx2 v[0:1], v4, s[6:7]
+; GFX10-NEXT:    global_load_dwordx2 v[2:3], v4, s[2:3]
+; GFX10-NEXT:    s_waitcnt vmcnt(1)
+; GFX10-NEXT:    v_mad_u64_u32 v[4:5], s0, v0, 0, 0
+; GFX10-NEXT:    s_waitcnt vmcnt(0)
+; GFX10-NEXT:    v_mul_lo_u32 v0, v0, v3
+; GFX10-NEXT:    v_mul_lo_u32 v1, v1, 0
+; GFX10-NEXT:    v_add3_u32 v5, v5, v0, v1
+; GFX10-NEXT:    v_mov_b32_e32 v0, 0
+; GFX10-NEXT:    global_store_dwordx2 v0, v[4:5], s[4:5]
+; GFX10-NEXT:    s_endpgm
+;
+; GFX11-LABEL: v_mul_i64_and_b_lo:
+; GFX11:       ; %bb.0:
+; GFX11-NEXT:    s_clause 0x1
+; GFX11-NEXT:    s_load_b128 s[4:7], s[0:1], 0x24
+; GFX11-NEXT:    s_load_b64 s[0:1], s[0:1], 0x34
+; GFX11-NEXT:    v_lshlrev_b32_e32 v2, 3, v0
+; GFX11-NEXT:    s_waitcnt lgkmcnt(0)
+; GFX11-NEXT:    s_clause 0x1
+; GFX11-NEXT:    global_load_b64 v[0:1], v2, s[6:7]
+; GFX11-NEXT:    global_load_b64 v[2:3], v2, s[0:1]
+; GFX11-NEXT:    s_waitcnt vmcnt(1)
+; GFX11-NEXT:    v_mad_u64_u32 v[4:5], null, v0, 0, 0
+; GFX11-NEXT:    s_waitcnt vmcnt(0)
+; GFX11-NEXT:    v_mul_lo_u32 v0, v0, v3
+; GFX11-NEXT:    v_mul_lo_u32 v1, v1, 0
+; GFX11-NEXT:    s_delay_alu instid0(VALU_DEP_1)
+; GFX11-NEXT:    v_add3_u32 v5, v5, v0, v1
+; GFX11-NEXT:    v_mov_b32_e32 v0, 0
+; GFX11-NEXT:    global_store_b64 v0, v[4:5], s[4:5]
+; GFX11-NEXT:    s_sendmsg sendmsg(MSG_DEALLOC_VGPRS)
+; GFX11-NEXT:    s_endpgm
+  %tid = call i32 @llvm.amdgcn.workitem.id.x()
+  %gep.a = getelementptr inbounds i64, ptr addrspace(1) %aptr, i32 %tid
+  %gep.b = getelementptr inbounds i64, ptr addrspace(1) %bptr, i32 %tid
+  %a = load i64, ptr addrspace(1) %gep.a
+  %b = load i64, ptr addrspace(1) %gep.b
+  %b_and = and i64 %b, u0xFFFFFFFF00000000
+  %mul = mul i64 %a, %b_and
+  store i64 %mul, ptr addrspace(1) %out
+  ret void
+}
+
+; 64-bit multiplication where the entire first argument is masked.
+define amdgpu_kernel void @v_mul_i64_and_hilo(ptr addrspace(1) %out, ptr addrspace(1) %aptr, ptr addrspace(1) %bptr) {
+; GFX10-LABEL: v_mul_i64_and_hilo:
+; GFX10:       ; %bb.0:
+; GFX10-NEXT:    s_load_dwordx2 s[0:1], s[0:1], 0x24
+; GFX10-NEXT:    v_mov_b32_e32 v0, 0
+; GFX10-NEXT:    v_mov_b32_e32 v1, 0
+; GFX10-NEXT:    v_mov_b32_e32 v2, 0
+; GFX10-NEXT:    s_waitcnt lgkmcnt(0)
+; GFX10-NEXT:    global_store_dwordx2 v2, v[0:1], s[0:1]
+; GFX10-NEXT:    s_endpgm
+;
+; GFX11-LABEL: v_mul_i64_and_hilo:
+; GFX11:       ; %bb.0:
+; GFX11-NEXT:    s_load_b64 s[0:1], s[0:1], 0x24
+; GFX11-NEXT:    v_mov_b32_e32 v0, 0
+; GFX11-NEXT:    v_dual_mov_b32 v1, 0 :: v_dual_mov_b32 v2, 0
+; GFX11-NEXT:    s_waitcnt lgkmcnt(0)
+; GFX11-NEXT:    global_store_b64 v2, v[0:1], s[0:1]
+; GFX11-NEXT:    s_sendmsg sendmsg(MSG_DEALLOC_VGPRS)
+; GFX11-NEXT:    s_endpgm
+  %tid = call i32 @llvm.amdgcn.workitem.id.x()
+  %gep.a = getelementptr inbounds i64, ptr addrspace(1) %aptr, i32 %tid
+  %gep.b = getelementptr inbounds i64, ptr addrspace(1) %bptr, i32 %tid
+  %a = load i64, ptr addrspace(1) %gep.a
+  %b = load i64, ptr addrspace(1) %gep.b
+  %a_and = and i64 %a, u0x0000000000000000
+  %mul = mul i64 %a_and, %b
+  store i64 %mul, ptr addrspace(1) %out
+  ret void
+}
+
+; 64-bit multiplication, where the first argument is masked before a branch
+define amdgpu_kernel void @mul64_and_in_branch(ptr addrspace(1) %out, ptr addrspace(1) %aptr, ptr addrspace(1) %bptr) {
+; GFX10-LABEL: mul64_and_in_branch:
+; GFX10:       ; %bb.0: ; %entry
+; GFX10-NEXT:    s_load_dwordx2 s[0:1], s[0:1], 0x24
+; GFX10-NEXT:    v_mov_b32_e32 v0, 0
+; GFX10-NEXT:    v_mov_b32_e32 v1, 0
+; GFX10-NEXT:    v_mov_b32_e32 v2, 0
+; GFX10-NEXT:    s_waitcnt lgkmcnt(0)
+; GFX10-NEXT:    global_store_dwordx2 v2, v[0:1], s[0:1]
+; GFX10-NEXT:    s_endpgm
+;
+; GFX11-LABEL: mul64_and_in_branch:
+; GFX11:       ; %bb.0: ; %entry
+; GFX11-NEXT:    s_load_b64 s[0:1], s[0:1], 0x24
+; GFX11-NEXT:    v_mov_b32_e32 v0, 0
+; GFX11-NEXT:    v_dual_mov_b32 v1, 0 :: v_dual_mov_b32 v2, 0
+; GFX11-NEXT:    s_waitcnt lgkmcnt(0)
+; GFX11-NEXT:    global_store_b64 v2, v[0:1], s[0:1]
+; GFX11-NEXT:    s_sendmsg sendmsg(MSG_DEALLOC_VGPRS)
+; GFX11-NEXT:    s_endpgm
+entry:
+  %tid = call i32 @llvm.amdgcn.workitem.id.x()
+  %gep.a = getelementptr inbounds i64, ptr addrspace(1) %aptr, i32 %tid
+  %gep.b = getelementptr inbounds i64, ptr addrspace(1) %bptr, i32 %tid
+  %a = load i64, ptr addrspace(1) %gep.a
+  %b = load i64, ptr addrspace(1) %gep.b
+  %a_and = and i64 %a, u0x0000000000000000
+  %0 = icmp eq i64 %b, 0
+  br i1 %0, label %if, label %else
+
+if:
+  %b_and = and i64 %b, u0xFFFFFFFF00000000
+  %1 = mul i64 %a_and, %b_and
+  br label %endif
+
+else:
+  %2 = mul i64 %a_and, %b
+  br label %endif
+
+endif:
+  %3 = phi i64 [%1, %if], [%2, %else]
+  store i64 %3, ptr addrspace(1) %out
+  ret void
+}
+
+; 64-bit multiplication with both arguments changed in differnt basic blocks.
+define amdgpu_kernel void @mul64_and_in_branch_2(ptr addrspace(1) %out, ptr addrspace(1) %aptr, ptr addrspace(1) %bptr) {
+; GFX10-LABEL: mul64_and_in_branch_2:
+; GFX10:       ; %bb.0: ; %entry
+; GFX10-NEXT:    s_clause 0x1
+; GFX10-NEXT:    s_load_dwordx4 s[4:7], s[0:1], 0x24
+; GFX10-NEXT:    s_load_dwordx2 s[2:3], s[0:1], 0x34
+; GFX10-NEXT:    v_lshlrev_b32_e32 v0, 3, v0
+; GFX10-NEXT:    s_waitcnt lgkmcnt(0)
+; GFX10-NEXT:    s_clause 0x1
+; GFX10-NEXT:    global_load_dwordx2 v[2:3], v0, s[6:7]
+; GFX10-NEXT:    global_load_dwordx2 v[4:5], v0, s[2:3]
+; GFX10-NEXT:    ; implicit-def: $vgpr0_vgpr1
+; GFX10-NEXT:    s_waitcnt vmcnt(1)
+; GFX10-NEXT:    v_cmp_ge_u64_e32 vcc_lo, 0, v[2:3]
+; GFX10-NEXT:    s_waitcnt vmcnt(0)
+; GFX10-NEXT:    v_mul_lo_u32 v5, v2, v5
+; GFX10-NEXT:    s_and_saveexec_b32 s0, vcc_lo
+; GFX10-NEXT:    s_xor_b32 s0, exec_lo, s0
+; GFX10-NEXT:  ; %bb.1: ; %else
+; GFX10-NEXT:    v_mad_u64_u32 v[0:1], s1, v2, v4, 0
+; GFX10-NEXT:    v_mul_lo_u32 v2, 0, v4
+; GFX10-NEXT:    v_add3_u32 v1, v1, v5, v2
+; GFX10-NEXT:    ; implicit-def: $vgpr2_vgpr3
+; GFX10-NEXT:    ; implicit-def: $vgpr5
+; GFX10-NEXT:  ; %bb.2: ; %Flow
+; GFX10-NEXT:    s_andn2_saveexec_b32 s0, s0
+; GFX10-NEXT:  ; %bb.3: ; %if
+; GFX10-NEXT:    v_mad_u64_u32 v[0:1], s1, v2, 0, 0
+; GFX10-NEXT:    v_mul_lo_u32 v2, 0, 0
+; GFX10-NEXT:    v_add3_u32 v1, v1, v5, v2
+; GFX10-NEXT:  ; %bb.4: ; %endif
+; GFX10-NEXT:    s_or_b32 exec_lo, exec_lo, s0
+; GFX10-NEXT:    v_mov_b32_e32 v2, 0
+; GFX10-NEXT:    global_store_dwordx2 v2, v[0:1], s[4:5]
+; GFX10-NEXT:    s_endpgm
+;
+; GFX11-LABEL: mul64_and_in_branch_2:
+; GFX11:       ; %bb.0: ; %entry
+; GFX11-NEXT:    s_clause 0x1
+; GFX11-NEXT:    s_load_b128 s[4:7], s[0:1], 0x24
+; GFX11-NEXT:    s_load_b64 s[0:1], s[0:1], 0x34
+; GFX11-NEXT:    v_lshlrev_b32_e32 v0, 3, v0
+; GFX11-NEXT:    s_waitcnt lgkmcnt(0)
+; GFX11-NEXT:    s_clause 0x1
+; GFX11-NEXT:    global_load_b64 v[2:3], v0, s[6:7]
+; GFX11-NEXT:    global_load_b64 v[4:5], v0, s[0:1]
+; GFX11-NEXT:    s_mov_b32 s0, exec_lo
+; GFX11-NEXT:    ; implicit-def: $vgpr0_vgpr1
+; GFX11-NEXT:    s_waitcnt vmcnt(0)
+; GFX11-NEXT:    v_mul_lo_u32 v5, v2, v5
+; GFX11-NEXT:    v_cmpx_ge_u64_e32 0, v[2:3]
+; GFX11-NEXT:    s_xor_b32 s0, exec_lo, s0
+; GFX11-NEXT:  ; %bb.1: ; %else
+; GFX11-NEXT:    v_mad_u64_u32 v[0:1], null, v2, v4, 0
+; GFX11-NEXT:    v_mul_lo_u32 v2, 0, v4
+; GFX11-NEXT:    s_delay_alu instid0(VALU_DEP_1)
+; GFX11-NEXT:    v_add3_u32 v1, v1, v5, v2
+; GFX11-NEXT:    ; implicit-def: $vgpr2_vgpr3
+; GFX11-NEXT:    ; implicit-def: $vgpr5
+; GFX11-NEXT:  ; %bb.2: ; %Flow
+; GFX11-NEXT:    s_and_not1_saveexec_b32 s0, s0
+; GFX11-NEXT:  ; %bb.3: ; %if
+; GFX11-NEXT:    v_mad_u64_u32 v[0:1], null, v2, 0, 0
+; GFX11-NEXT:    v_mul_lo_u32 v2, 0, 0
+; GFX11-NEXT:    s_delay_alu instid0(VALU_DEP_1)
+; GFX11-NEXT:    v_add3_u32 v1, v1, v5, v2
+; GFX11-NEXT:  ; %bb.4: ; %endif
+; GFX11-NEXT:    s_or_b32 exec_lo, exec_lo, s0
+; GFX11-NEXT:    v_mov_b32_e32 v2, 0
+; GFX11-NEXT:    global_store_b64 v2, v[0:1], s[4:5]
+; GFX11-NEXT:    s_sendmsg sendmsg(MSG_DEALLOC_VGPRS)
+; GFX11-NEXT:    s_endpgm
+entry:
+  %tid = call i32 @llvm.amdgcn.workitem.id.x()
+  %gep.a = getelementptr inbounds i64, ptr addrspace(1) %aptr, i32 %tid
+  %gep.b = getelementptr inbounds i64, ptr addrspace(1) %bptr, i32 %tid
+  %a = load i64, ptr addrspace(1) %gep.a
+  %b = load i64, ptr addrspace(1) %gep.b
+  %a_and = and i64 %a, u0x00000000FFFFFFFF
+  %0 = icmp ugt i64 %a, 0
+  br i1 %0, label %if, label %else
+
+if:
+  %b_and = and i64 %b, u0xFFFFFFFF00000000
+  %1 = mul i64 %a_and, %b_and
+  br label %endif
+
+else:
+  %2 = mul i64 %a_and, %b
+  br label %endif
+
+endif:
+  %3 = phi i64 [%1, %if], [%2, %else]
+  store i64 %3, ptr addrspace(1) %out
+  ret void
+}
+
+
-- 
2.7.4