From 72d53e109e487c98e13347f783f624c27d19210f Mon Sep 17 00:00:00 2001 From: Matt Arsenault Date: Thu, 18 May 2023 12:41:28 +0100 Subject: [PATCH] EarlyCSE: Add regression test for computeKnownFPClass phi handling This was reduced from the failure that caused the revert in e13f88d1ff5234946af6349a9a7cf56fcb6c040e --- .../EarlyCSE/nofpclass-phi-regression.ll | 48 ++++++++++++++++++++++ 1 file changed, 48 insertions(+) create mode 100644 llvm/test/Transforms/EarlyCSE/nofpclass-phi-regression.ll diff --git a/llvm/test/Transforms/EarlyCSE/nofpclass-phi-regression.ll b/llvm/test/Transforms/EarlyCSE/nofpclass-phi-regression.ll new file mode 100644 index 0000000..81cead2 --- /dev/null +++ b/llvm/test/Transforms/EarlyCSE/nofpclass-phi-regression.ll @@ -0,0 +1,48 @@ +; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 2 +; RUN: opt -S -passes=early-cse %s | FileCheck %s + +; Check for regression when phi support for computeKnownFPClass was +; first committed. +define void @compute_known_fpclass_phi_assert(i1 %cmp46, i1 %tobool51, ptr %a01) { +; CHECK-LABEL: define void @compute_known_fpclass_phi_assert +; CHECK-SAME: (i1 [[CMP46:%.*]], i1 [[TOBOOL51:%.*]], ptr [[A01:%.*]]) { +; CHECK-NEXT: entry: +; CHECK-NEXT: br label [[FOR_COND45:%.*]] +; CHECK: for.cond45: +; CHECK-NEXT: [[TMP0:%.*]] = phi double [ [[TMP1:%.*]], [[FOR_INC80:%.*]] ], [ 0.000000e+00, [[ENTRY:%.*]] ] +; CHECK-NEXT: br i1 [[CMP46]], label [[FOR_BODY48:%.*]], label [[FOR_END82:%.*]] +; CHECK: for.body48: +; CHECK-NEXT: br i1 [[TOBOOL51]], label [[FOR_INC80]], label [[IF_THEN52:%.*]] +; CHECK: if.then52: +; CHECK-NEXT: store double 0.000000e+00, ptr [[A01]], align 8 +; CHECK-NEXT: br label [[FOR_INC80]] +; CHECK: for.inc80: +; CHECK-NEXT: [[TMP1]] = phi double [ 0.000000e+00, [[IF_THEN52]] ], [ [[TMP0]], [[FOR_BODY48]] ] +; CHECK-NEXT: br label [[FOR_COND45]] +; CHECK: for.end82: +; CHECK-NEXT: [[MUL84:%.*]] = fmul double [[TMP0]], 0.000000e+00 +; CHECK-NEXT: ret void +; +entry: + br label %for.cond45 + +for.cond45: ; preds = %for.inc80, %entry + %0 = phi double [ %1, %for.inc80 ], [ 0.000000e+00, %entry ] + br i1 %cmp46, label %for.body48, label %for.end82 + +for.body48: ; preds = %for.cond45 + br i1 %tobool51, label %for.inc80, label %if.then52 + +if.then52: ; preds = %for.body48 + store double 0.000000e+00, ptr %a01, align 8 + br label %for.inc80 + +for.inc80: ; preds = %if.then52, %for.body48 + %1 = phi double [ 0.000000e+00, %if.then52 ], [ %0, %for.body48 ] + br label %for.cond45 + +for.end82: ; preds = %for.cond45 + %mul84 = fmul double %0, 0.000000e+00 + %neg = fneg double %mul84 + ret void +} -- 2.7.4