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TheRock/compiler/amd-llvm/llvm/test/CodeGen/X86/post-ra-sched.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

41 lines
1.5 KiB
LLVM

; RUN: llc < %s -mtriple=i386 -mcpu=pentium4 | FileCheck %s
; RUN: llc < %s -mtriple=i386 -mcpu=pentium4m | FileCheck %s
; RUN: llc < %s -mtriple=i386 -mcpu=pentium-m | FileCheck %s
; RUN: llc < %s -mtriple=i386 -mcpu=prescott | FileCheck %s
; RUN: llc < %s -mtriple=i386 -mcpu=nocona | FileCheck %s
;
; Verify that scheduling puts some distance between a load feeding into
; the address of another load, and that second load. This currently
; happens during the post-RA-scheduler, which should be enabled by
; default with the above specified cpus.
@ptrs = external dso_local global [0 x ptr], align 4
@idxa = common global i32 0, align 4
@idxb = common global i32 0, align 4
@res = common global i32 0, align 4
define void @addindirect() {
; CHECK-LABEL: addindirect:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: movl idxb, %ecx
; CHECK-NEXT: movl idxa, %eax
; CHECK-NEXT: movl ptrs(,%ecx,4), %ecx
; CHECK-NEXT: movl ptrs(,%eax,4), %eax
; CHECK-NEXT: movl (%ecx), %ecx
; CHECK-NEXT: addl (%eax), %ecx
; CHECK-NEXT: movl %ecx, res
; CHECK-NEXT: retl
entry:
%0 = load i32, ptr @idxa, align 4
%arrayidx = getelementptr inbounds [0 x ptr], ptr @ptrs, i32 0, i32 %0
%1 = load ptr, ptr %arrayidx, align 4
%2 = load i32, ptr %1, align 4
%3 = load i32, ptr @idxb, align 4
%arrayidx1 = getelementptr inbounds [0 x ptr], ptr @ptrs, i32 0, i32 %3
%4 = load ptr, ptr %arrayidx1, align 4
%5 = load i32, ptr %4, align 4
%add = add i32 %5, %2
store i32 %add, ptr @res, align 4
ret void
}