forked from OSchip/llvm-project
55 lines
1.3 KiB
LLVM
55 lines
1.3 KiB
LLVM
; RUN: llc < %s -mtriple=thumb-apple-ios | FileCheck %s
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define void @test1() {
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; CHECK-LABEL: test1:
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; CHECK: sub sp, #256
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; CHECK: add sp, #256
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%tmp = alloca [ 64 x i32 ] , align 4
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ret void
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}
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define void @test2() {
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; CHECK-LABEL: test2:
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; CHECK: ldr r0, LCPI
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; CHECK: add sp, r0
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; CHECK: subs r4, r7, #4
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; CHECK: mov sp, r4
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%tmp = alloca [ 4168 x i8 ] , align 4
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ret void
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}
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define i32 @test3() {
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; CHECK-LABEL: test3:
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; CHECK: ldr r1, LCPI
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; CHECK: add sp, r1
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; CHECK: ldr r1, LCPI
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; CHECK: add r1, sp
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; CHECK: subs r4, r7, #4
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; CHECK: mov sp, r4
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%retval = alloca i32, align 4
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%tmp = alloca i32, align 4
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%a = alloca [805306369 x i8], align 16
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store i32 0, i32* %tmp
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%tmp1 = load i32* %tmp
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ret i32 %tmp1
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}
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; Here, the adds get optimized out because they are dead, but the calculation
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; of the address of stack_a is dead but not optimized out. When the address
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; calculation gets expanded to two instructions, we need to avoid reading a
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; dead register.
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; No CHECK lines (just test for crashes), as we hope this will be optimised
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; better in future.
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define i32 @test4() {
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entry:
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%stack_a = alloca i8, align 1
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%stack_b = alloca [256 x i32*], align 4
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%int = ptrtoint i8* %stack_a to i32
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%add = add i32 %int, 1
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br label %block2
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block2:
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%add2 = add i32 %add, 1
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ret i32 0
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}
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