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| ; RUN: llc < %s -mtriple=aarch64-linux-gnuabi -O2 -tail-dup-placement=0 | FileCheck %s
; -tail-dup-placement causes tail duplication during layout. This breaks the
; assumptions of the test case as written (specifically, it creates an
; additional cmp instruction, creating a false positive), so we pass
; -tail-dup-placement=0 to restore the original behavior
; marked as external to prevent possible optimizations
@a = external global i32
@b = external global i32
@c = external global i32
@d = external global i32
@e = external global i32
define void @combine-sign-comparisons-by-cse(i32 *%arg) {
; CHECK: cmp
; CHECK: b.ge
; CHECK-NOT: cmp
; CHECK: b.le
entry:
%a = load i32, i32* @a, align 4
%b = load i32, i32* @b, align 4
%c = load i32, i32* @c, align 4
%d = load i32, i32* @d, align 4
%e = load i32, i32* @e, align 4
%cmp = icmp slt i32 %a, %e
br i1 %cmp, label %land.lhs.true, label %lor.lhs.false
land.lhs.true:
%cmp1 = icmp eq i32 %b, %c
br i1 %cmp1, label %return, label %if.end
lor.lhs.false:
%cmp2 = icmp sgt i32 %a, %e
br i1 %cmp2, label %land.lhs.true3, label %if.end
land.lhs.true3:
%cmp4 = icmp eq i32 %b, %d
br i1 %cmp4, label %return, label %if.end
if.end:
br label %return
return:
%retval.0 = phi i32 [ 0, %if.end ], [ 1, %land.lhs.true3 ], [ 1, %land.lhs.true ]
store i32 %a, i32 *%arg
ret void
}
define void @combine_vector_zeros(<8 x i8>* %p, <16 x i8>* %q) {
; CHECK-LABEL: combine_vector_zeros:
; CHECK: movi v[[REG:[0-9]+]].2d, #0
; CHECK-NOT: movi
; CHECK: str d[[REG]], [x0]
; CHECK: str q[[REG]], [x1]
entry:
store <8 x i8> zeroinitializer, <8 x i8>* %p
store <16 x i8> zeroinitializer, <16 x i8>* %q
ret void
}
define void @combine_vector_ones(<2 x i32>* %p, <4 x i32>* %q) {
; CHECK-LABEL: combine_vector_ones:
; CHECK: movi v[[REG:[0-9]+]].2d, #0xffffffffffffffff
; CHECK-NOT: movi
; CHECK: str d[[REG]], [x0]
; CHECK: str q[[REG]], [x1]
entry:
store <2 x i32> <i32 -1, i32 -1>, <2 x i32>* %p
store <4 x i32> <i32 -1, i32 -1, i32 -1, i32 -1>, <4 x i32>* %q
ret void
}
|