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| author | Lang Hames <lhames@gmail.com> | 2012-03-01 00:41:17 +0000 |
|---|---|---|
| committer | Lang Hames <lhames@gmail.com> | 2012-03-01 00:41:17 +0000 |
| commit | 275ff9bb17698a5eee613c20eca31b4835ae60db (patch) | |
| tree | 7fcea1793ae4cfa06ab873ada1937a92d293b2e6 /test/CodeGen/X86/2012-02-29-CoalescerBug.ll | |
| parent | 562a67db329b7867dac50ccad9ca19c5554a3d9e (diff) | |
| download | llvm-275ff9bb17698a5eee613c20eca31b4835ae60db.tar.gz llvm-275ff9bb17698a5eee613c20eca31b4835ae60db.tar.bz2 llvm-275ff9bb17698a5eee613c20eca31b4835ae60db.tar.xz | |
Don't redundantly copy implicit operands when rematerializing.
While we're at it - don't copy vreg implicit operands while rematerializing.
This fixes PR12138.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151779 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/X86/2012-02-29-CoalescerBug.ll')
| -rw-r--r-- | test/CodeGen/X86/2012-02-29-CoalescerBug.ll | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/test/CodeGen/X86/2012-02-29-CoalescerBug.ll b/test/CodeGen/X86/2012-02-29-CoalescerBug.ll new file mode 100644 index 0000000000..bdce85325f --- /dev/null +++ b/test/CodeGen/X86/2012-02-29-CoalescerBug.ll @@ -0,0 +1,58 @@ +; RUN: llc -O1 <%s +; PR12138 +target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128-n8:16:32-S128" +target triple = "i386-apple-macosx10.7.0" + +%struct.S0 = type { i8, i32 } + +@d = external global [2 x [2 x %struct.S0]], align 4 +@c = external global i32, align 4 +@e = external global i32, align 4 +@b = external global i32, align 4 +@a = external global i32, align 4 + +define void @fn2() nounwind optsize ssp { +entry: + store i64 0, i64* bitcast ([2 x [2 x %struct.S0]]* @d to i64*), align 4 + %0 = load i32* @c, align 4 + %tobool2 = icmp eq i32 %0, 0 + %1 = load i32* @a, align 4 + %tobool4 = icmp eq i32 %1, 0 + br label %for.cond + +for.cond: ; preds = %if.end, %entry + %f.1.0 = phi i32 [ undef, %entry ], [ %sub, %if.end ] + %g.0 = phi i64 [ 0, %entry ], [ %ins, %if.end ] + %tobool = icmp eq i32 %f.1.0, 0 + br i1 %tobool, label %for.end, label %for.body + +for.body: ; preds = %for.cond + %2 = lshr i64 %g.0, 32 + %conv = trunc i64 %2 to i16 + br i1 %tobool2, label %lor.rhs, label %lor.end + +lor.rhs: ; preds = %for.body + store i32 1, i32* @e, align 4 + br label %lor.end + +lor.end: ; preds = %lor.rhs, %for.body + %xor.i = xor i16 %conv, 1 + %p1.lobit.i8 = lshr i64 %g.0, 47 + %p1.lobit.i8.tr = trunc i64 %p1.lobit.i8 to i16 + %p1.lobit.i = and i16 %p1.lobit.i8.tr, 1 + %and.i = and i16 %p1.lobit.i, %xor.i + %3 = xor i16 %and.i, 1 + %sub.conv.i = sub i16 %conv, %3 + %conv3 = sext i16 %sub.conv.i to i32 + store i32 %conv3, i32* @b, align 4 + br i1 %tobool4, label %if.end, label %for.end + +if.end: ; preds = %lor.end + %mask = and i64 %g.0, -256 + %ins = or i64 %mask, 1 + %sub = add nsw i32 %f.1.0, -1 + br label %for.cond + +for.end: ; preds = %lor.end, %for.cond + ret void +} |