diff options
Diffstat (limited to 'test/Transforms/StraightLineStrengthReduce/X86/no-slsr.ll')
| -rw-r--r-- | test/Transforms/StraightLineStrengthReduce/X86/no-slsr.ll | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/test/Transforms/StraightLineStrengthReduce/X86/no-slsr.ll b/test/Transforms/StraightLineStrengthReduce/X86/no-slsr.ll new file mode 100644 index 0000000..94c47c7 --- /dev/null +++ b/test/Transforms/StraightLineStrengthReduce/X86/no-slsr.ll @@ -0,0 +1,30 @@ +; RUN: opt < %s -slsr -gvn -dce -S | FileCheck %s + +target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" +target triple = "x86_64-unknown-linux-gnu" + +; Do not perform SLSR on &input[s] and &input[s * 2] which fit into addressing +; modes of X86. +define i32 @slsr_gep(i32* %input, i64 %s) { +; CHECK-LABEL: @slsr_gep( + ; v0 = input[0]; + %p0 = getelementptr inbounds i32, i32* %input, i64 0 + %v0 = load i32, i32* %p0 + + ; v1 = input[s]; + %p1 = getelementptr inbounds i32, i32* %input, i64 %s +; CHECK: %p1 = getelementptr inbounds i32, i32* %input, i64 %s + %v1 = load i32, i32* %p1 + + ; v2 = input[s * 2]; + %s2 = mul nsw i64 %s, 2 + %p2 = getelementptr inbounds i32, i32* %input, i64 %s2 +; CHECK: %p2 = getelementptr inbounds i32, i32* %input, i64 %s2 + %v2 = load i32, i32* %p2 + + ; return v0 + v1 + v2; + %1 = add i32 %v0, %v1 + %2 = add i32 %1, %v2 + ret i32 %2 +} + |