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TheRock/compiler/amd-llvm/llvm/test/CodeGen/X86/2010-06-15-FastAllocEarlyCLobber.ll
derek.holloway 7502bf64a4
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Flatten subprojects into a single base monorepo
2026-09-02 16:34:47 -07:00

30 lines
1.3 KiB
LLVM

; RUN: llc -regalloc=fast -optimize-regalloc=0 -no-integrated-as < %s | FileCheck %s
; PR7382
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
target triple = "x86_64-unknown-linux-gnu"
@.str = private constant [23 x i8] c"This should be -1: %d\0A\00" ; <ptr> [#uses=1]
define i32 @main() {
entry:
%retval = alloca i32, align 4 ; <ptr> [#uses=3]
%v = alloca i32, align 4 ; <ptr> [#uses=3]
store i32 0, ptr %retval
%zero = load i32, ptr %retval
; The earlyclobber register EC0 should not be spilled before the inline asm.
; Yes, check-not can refer to FileCheck variables defined in the future.
; CHECK-NOT: [[EC0]]{{.*}}(%rsp)
; CHECK: bsr {{[^,]*}}, [[EC0:%...]]
%0 = call i32 asm "bsr $1, $0\0A\09cmovz $2, $0", "=&r,ro,r,~{cc},~{dirflag},~{fpsr},~{flags}"(i32 %zero, i32 -1) nounwind, !srcloc !0 ; <i32> [#uses=1]
store i32 %0, ptr %v
%tmp = load i32, ptr %v ; <i32> [#uses=1]
%call1 = call i32 (ptr, ...) @printf(ptr @.str, i32 %tmp) ; <i32> [#uses=0]
store i32 0, ptr %retval
%1 = load i32, ptr %retval ; <i32> [#uses=1]
ret i32 %0
}
declare i32 @printf(ptr, ...)
!0 = !{i32 191}