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https://github.com/c64scene-ar/llvm-6502.git
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16c7e0b48c
Improvements over r195317: - Set/restore EnableFastISel flag instead of just running FastISel within SelectAllBasicBlocks; the flag is checked in various places, and FastISel won't run properly if those places don't do the right thing. - Test looks for normal ISel versus FastISel behavior, and not something more subtle that doesn't work everywhere. Based on work by Andrea Di Biagio. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@195491 91177308-0d34-0410-b5e6-96231b3b80d8
43 lines
885 B
LLVM
43 lines
885 B
LLVM
; RUN: llc -O2 -march=x86 < %s | FileCheck %s
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define i32* @fooOptnone(i32* %p, i32* %q, i32** %z) #0 {
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entry:
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%r = load i32* %p
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%s = load i32* %q
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%y = load i32** %z
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%t0 = add i32 %r, %s
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%t1 = add i32 %t0, 1
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%t2 = getelementptr i32* %y, i32 1
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%t3 = getelementptr i32* %t2, i32 %t1
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ret i32* %t3
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; 'optnone' should use fast-isel which will not produce 'lea'.
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; CHECK-LABEL: fooOptnone:
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; CHECK-NOT: lea
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; CHECK: ret
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}
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define i32* @fooNormal(i32* %p, i32* %q, i32** %z) #1 {
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entry:
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%r = load i32* %p
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%s = load i32* %q
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%y = load i32** %z
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%t0 = add i32 %r, %s
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%t1 = add i32 %t0, 1
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%t2 = getelementptr i32* %y, i32 1
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%t3 = getelementptr i32* %t2, i32 %t1
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ret i32* %t3
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; Normal ISel will produce 'lea'.
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; CHECK-LABEL: fooNormal:
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; CHECK: lea
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; CHECK: ret
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}
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attributes #0 = { nounwind optnone noinline }
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attributes #1 = { nounwind }
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