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a72e83c26e
For historic reasons, the behavior of .align differs between targets. Fortunately, there are alternatives, .p2align and .balign, which make the interpretation of the parameter explicit, and which behave consistently across targets. This patch teaches MC to use .p2align instead of .align, so that people reading code for multiple architectures don't have to remember which way each platform does its .align directive. Differential Revision: http://reviews.llvm.org/D16549 llvm-svn: 258750
55 lines
1.1 KiB
LLVM
55 lines
1.1 KiB
LLVM
; RUN: llc -relocation-model=pic -mtriple=thumbv7-unknown-linux -o - %s | FileCheck %s
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@x = external global i32
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; CHECK: .globl foo
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; CHECK-NEXT: .p2align 2
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define i32* @foo() {
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ret i32* @x
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}
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; CHECK: .globl bar
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; CHECK-NEXT: .p2align 1
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define i32* @bar() {
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ret i32* zeroinitializer
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}
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@a = external global i32
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@b = external global i32
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@c = external global i32
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@d = external global i32
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; Create a Thumb-2 jump table, which should force alignment to 4 bytes.
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; CHECK: .globl baz
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; CHECK-NEXT: .p2align 2
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; CHECK: tbb
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define i32 @baz() {
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%1 = load i32, i32* @c, align 4
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switch i32 %1, label %7 [
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i32 1, label %2
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i32 4, label %5
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i32 9, label %5
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i32 3, label %8
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]
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; <label>:2
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%3 = load i32, i32* @a, align 4
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%4 = tail call i32 bitcast (i32 (...)* @fn2 to i32 (i32 (...)*, i32, i32)*)(i32 (...)* bitcast (i32 ()* @baz to i32 (...)*), i32 0, i32 %3) #2
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br label %8
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; <label>:5
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%6 = load i32, i32* @d, align 4
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store i32 %6, i32* @b, align 4
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br label %8
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; <label>:7
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br label %8
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; <label>:8
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%e.0 = phi i32 [ 1, %7 ], [ 1, %2 ], [ 0, %0 ], [ 0, %5 ]
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ret i32 %e.0
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}
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declare i32 @fn2(...)
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