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Diffstat (limited to 'test/Transforms/CodeGenPrepare/X86/extend-sink-hoist.ll')
-rw-r--r-- | test/Transforms/CodeGenPrepare/X86/extend-sink-hoist.ll | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/test/Transforms/CodeGenPrepare/X86/extend-sink-hoist.ll b/test/Transforms/CodeGenPrepare/X86/extend-sink-hoist.ll new file mode 100644 index 0000000000..430b99299d --- /dev/null +++ b/test/Transforms/CodeGenPrepare/X86/extend-sink-hoist.ll @@ -0,0 +1,64 @@ +; RUN: opt -codegenprepare -disable-cgp-branch-opts -S < %s | FileCheck %s +target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" +target triple = "x86_64-unknown-linux-gnu" + +; The first cast should be sunk into block2, in order that the +; instruction selector can form an efficient +; i64 * i64 -> i128 multiplication. +define i128 @sink(i64* %mem1, i64* %mem2) { +; CHECK-LABEL: block1: +; CHECK-NEXT: load +block1: + %l1 = load i64* %mem1 + %s1 = sext i64 %l1 to i128 + br label %block2 + +; CHECK-LABEL: block2: +; CHECK-NEXT: sext +; CHECK-NEXT: load +; CHECK-NEXT: sext +block2: + %l2 = load i64* %mem2 + %s2 = sext i64 %l2 to i128 + %res = mul i128 %s1, %s2 + ret i128 %res +} + +; The first cast should be hoisted into block1, in order that the +; instruction selector can form an extend-load. +define i64 @hoist(i32* %mem1, i32* %mem2) { +; CHECK-LABEL: block1: +; CHECK-NEXT: load +; CHECK-NEXT: sext +block1: + %l1 = load i32* %mem1 + br label %block2 + +; CHECK-LABEL: block2: +; CHECK-NEXT: load +; CHECK-NEXT: sext +block2: + %s1 = sext i32 %l1 to i64 + %l2 = load i32* %mem2 + %s2 = sext i32 %l2 to i64 + %res = mul i64 %s1, %s2 + ret i64 %res +} + +; Make sure the cast sink logic and OptimizeExtUses don't end up in an infinite +; loop. +define i128 @use_ext_source() { +block1: + %v1 = or i64 undef, undef + %v2 = zext i64 %v1 to i128 + br i1 undef, label %block2, label %block3 + +block2: + %v3 = add i64 %v1, 1 + %v4 = zext i64 %v3 to i128 + br label %block3 + +block3: + %res = phi i128 [ %v2, %block1 ], [ %v4, %block2 ] + ret i128 %res +} |