83 lines
2.3 KiB
LLVM
83 lines
2.3 KiB
LLVM
; RUN: llc -o - -mtriple=i386-unknown-linux-gnu < %s | FileCheck %s
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; RUN: llc -o - -mtriple=x86_64-unknown-linux-gnu < %s | FileCheck %s
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@a = common global i32 0, align 4
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@b = common global i32 0, align 4
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@c = common global i32 0, align 4
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@e = common global i32 0, align 4
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@x = common global i32 0, align 4
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@f = common global i32 0, align 4
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@h = common global i32 0, align 4
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@i = common global i32 0, align 4
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; Test -Os to make sure immediates with multiple users don't get pulled in to
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; instructions.
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define i32 @foo() optsize {
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; CHECK-LABEL: foo:
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; CHECK: movl $1234, [[R1:%[a-z]+]]
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; CHECK-NOT: movl $1234, a
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; CHECK-NOT: movl $1234, b
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; CHECK-NOT: movl $12, c
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; CHECK-NOT: cmpl $12, e
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; CHECK: movl [[R1]], a
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; CHECK: movl [[R1]], b
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entry:
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store i32 1234, i32* @a
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store i32 1234, i32* @b
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store i32 12, i32* @c
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%0 = load i32, i32* @e
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%cmp = icmp eq i32 %0, 12
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br i1 %cmp, label %if.then, label %if.end
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if.then: ; preds = %entry
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store i32 1, i32* @x
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br label %if.end
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; New block.. Make sure 1234 isn't live across basic blocks from before.
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; CHECK: movl $1234, f
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; CHECK: movl $555, [[R3:%[a-z]+]]
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; CHECK-NOT: movl $555, h
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; CHECK-NOT: addl $555, i
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; CHECK: movl [[R3]], h
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; CHECK: addl [[R3]], i
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if.end: ; preds = %if.then, %entry
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store i32 1234, i32* @f
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store i32 555, i32* @h
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%1 = load i32, i32* @i
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%add1 = add nsw i32 %1, 555
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store i32 %add1, i32* @i
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ret i32 0
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}
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; Test -O2 to make sure that all immediates get pulled in to their users.
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define i32 @foo2() {
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; CHECK-LABEL: foo2:
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; CHECK: movl $1234, a
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; CHECK: movl $1234, b
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entry:
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store i32 1234, i32* @a
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store i32 1234, i32* @b
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ret i32 0
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}
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declare void @llvm.memset.p0i8.i32(i8* nocapture, i8, i32, i32, i1) #1
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@AA = common global [100 x i8] zeroinitializer, align 1
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; memset gets lowered in DAG. Constant merging should hoist all the
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; immediates used to store to the individual memory locations. Make
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; sure we don't directly store the immediates.
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define void @foomemset() optsize {
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; CHECK-LABEL: foomemset:
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; CHECK-NOT: movl ${{.*}}, AA
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; CHECK: mov{{l|q}} %{{e|r}}ax, AA
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entry:
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call void @llvm.memset.p0i8.i32(i8* getelementptr inbounds ([100 x i8], [100 x i8]* @AA, i32 0, i32 0), i8 33, i32 24, i32 1, i1 false)
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ret void
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}
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