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author | Stuart Hastings <stuart@apple.com> | 2011-05-31 19:29:55 +0000 |
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committer | Stuart Hastings <stuart@apple.com> | 2011-05-31 19:29:55 +0000 |
commit | df48e84b5bf0967c1fc397912c109f29475c791b (patch) | |
tree | a885c0c7c46c2447411bddcbc4487868f90d9d77 /test/Transforms/InstCombine/2011-05-28-swapmulsub.ll | |
parent | f729e913539a1fce09c3ff465f3a0fe911f551a8 (diff) | |
download | llvm-df48e84b5bf0967c1fc397912c109f29475c791b.tar.gz llvm-df48e84b5bf0967c1fc397912c109f29475c791b.tar.bz2 llvm-df48e84b5bf0967c1fc397912c109f29475c791b.tar.xz |
Followup to 132316; accept arbitrary constants, add with a constant,
sub with a non-constant. Fix comments, enlarge test case.
rdar://problem/6501862
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132348 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms/InstCombine/2011-05-28-swapmulsub.ll')
-rw-r--r-- | test/Transforms/InstCombine/2011-05-28-swapmulsub.ll | 45 |
1 files changed, 39 insertions, 6 deletions
diff --git a/test/Transforms/InstCombine/2011-05-28-swapmulsub.ll b/test/Transforms/InstCombine/2011-05-28-swapmulsub.ll index e4417ef96a..b096d1f952 100644 --- a/test/Transforms/InstCombine/2011-05-28-swapmulsub.ll +++ b/test/Transforms/InstCombine/2011-05-28-swapmulsub.ll @@ -2,18 +2,14 @@ ; RUN: opt -S -instcombine < %s | FileCheck %s target triple = "x86_64-apple-macosx10.6.6" -define zeroext i16 @foo(i32 %on_off, i16* %puls) nounwind uwtable ssp { +define zeroext i16 @foo1(i32 %on_off) nounwind uwtable ssp { entry: %on_off.addr = alloca i32, align 4 - %puls.addr = alloca i16*, align 8 %a = alloca i32, align 4 store i32 %on_off, i32* %on_off.addr, align 4 - store i16* %puls, i16** %puls.addr, align 8 %tmp = load i32* %on_off.addr, align 4 -; CHECK-NOT: sub -; CHECK-NOT: mul -; (1 - %tmp) * (-2) -> (%tmp - 1) * 2 %sub = sub i32 1, %tmp +; CHECK-NOT: mul i32 %mul = mul i32 %sub, -2 ; CHECK: shl ; CHECK-NEXT: add @@ -22,3 +18,40 @@ entry: %conv = trunc i32 %tmp1 to i16 ret i16 %conv } + +define zeroext i16 @foo2(i32 %on_off, i32 %q) nounwind uwtable ssp { +entry: + %on_off.addr = alloca i32, align 4 + %q.addr = alloca i32, align 4 + %a = alloca i32, align 4 + store i32 %on_off, i32* %on_off.addr, align 4 + store i32 %q, i32* %q.addr, align 4 + %tmp = load i32* %q.addr, align 4 + %tmp1 = load i32* %on_off.addr, align 4 + %sub = sub i32 %tmp, %tmp1 +; CHECK-NOT: mul i32 + %mul = mul i32 %sub, -4 +; CHECK: sub i32 +; CHECK-NEXT: shl + store i32 %mul, i32* %a, align 4 + %tmp2 = load i32* %a, align 4 + %conv = trunc i32 %tmp2 to i16 + ret i16 %conv +} + +define zeroext i16 @foo3(i32 %on_off) nounwind uwtable ssp { +entry: + %on_off.addr = alloca i32, align 4 + %a = alloca i32, align 4 + store i32 %on_off, i32* %on_off.addr, align 4 + %tmp = load i32* %on_off.addr, align 4 + %sub = sub i32 7, %tmp +; CHECK-NOT: mul i32 + %mul = mul i32 %sub, -4 +; CHECK: shl +; CHECK-NEXT: add + store i32 %mul, i32* %a, align 4 + %tmp1 = load i32* %a, align 4 + %conv = trunc i32 %tmp1 to i16 + ret i16 %conv +} |