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

42 lines
1.1 KiB
LLVM

; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 5
; RUN: llc < %s -O3 -mtriple=x86_64-- |FileCheck %s
; If constant 4294967295 is hoisted to a variable, then we won't be able to
; use a shift right by 32 to optimize the compare.
define i64 @foo(i64 %data1, i64 %data2, i64 %data3) {
; CHECK-LABEL: foo:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: movq %rdx, %rax
; CHECK-NEXT: shrq $32, %rdi
; CHECK-NEXT: je .LBB0_2
; CHECK-NEXT: # %bb.1:
; CHECK-NEXT: incq %rax
; CHECK-NEXT: retq
; CHECK-NEXT: .LBB0_2: # %L_val2
; CHECK-NEXT: shrq $32, %rsi
; CHECK-NEXT: je .LBB0_4
; CHECK-NEXT: # %bb.3:
; CHECK-NEXT: addq $2, %rax
; CHECK-NEXT: retq
; CHECK-NEXT: .LBB0_4: # %L_val3
; CHECK-NEXT: addq $3, %rax
; CHECK-NEXT: retq
entry:
%val1 = add i64 %data3, 1
%x = icmp ugt i64 %data1, 4294967295
br i1 %x, label %End, label %L_val2
L_val2:
%val2 = add i64 %data3, 2
%y = icmp ugt i64 %data2, 4294967295
br i1 %y, label %End, label %L_val3
L_val3:
%val3 = add i64 %data3, 3
br label %End
End:
%p1 = phi i64 [%val1,%entry], [%val2,%L_val2], [%val3,%L_val3]
ret i64 %p1
}