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887edb78a5
PC-Relative addressing introduces a fair bit of complexity for correctly
eliminating TOC accesses. FastISel does not include any of that handling so we
miscompile code with -mcpu=pwr10 -O0 if it includes an external call that
FastISel does not handle followed by any of the following:
Floating point constant materialization
Materialization of a GlobalValue
Call that FastISel does handle
This patch switches to SDISel for any of the above.
Differential revision: https://reviews.llvm.org/D86343
76 lines
2.9 KiB
LLVM
76 lines
2.9 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc -O0 -verify-machineinstrs -mtriple=powerpc64le-unknown-linux-gnu \
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; RUN: -fast-isel -mcpu=pwr10 -ppc-asm-full-reg-names -ppc-vsr-nums-as-vr < %s | \
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; RUN: FileCheck %s
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%struct._IO_FILE = type { i32, i8*, i8*, i8*, i8*, i8*, i8*, i8*, i8*, i8*, i8*, i8*, %struct._IO_marker*, %struct._IO_FILE*, i32, i32, i64, i16, i8, [1 x i8], i8*, i64, i8*, i8*, i8*, i8*, i64, i32, [20 x i8] }
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%struct._IO_marker = type { %struct._IO_marker*, %struct._IO_FILE*, i32 }
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@.str = private unnamed_addr constant [25 x i8] c"Breaking the TOC for FP\0A\00", align 1
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@.str.1 = private unnamed_addr constant [25 x i8] c"Breaking the TOC for GV\0A\00", align 1
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@stdout = external global %struct._IO_FILE*, align 8
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; Function Attrs: noinline nounwind optnone
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define internal void @loadFP(double* %d) #0 {
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; CHECK-LABEL: loadFP:
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; CHECK: .localentry loadFP, 1
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; CHECK-NEXT: # %bb.0: # %entry
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; CHECK-NEXT: mflr r0
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; CHECK-NEXT: std r0, 16(r1)
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; CHECK-NEXT: stdu r1, -112(r1)
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; CHECK-NEXT: std r3, 104(r1)
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; CHECK-NEXT: paddi r3, 0, .L.str@PCREL, 1
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; CHECK-NEXT: bl printf@notoc
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; CHECK-NEXT: ld r4, 104(r1)
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; CHECK-NEXT: lis r5, 16403
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; CHECK-NEXT: ori r5, r5, 62914
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; CHECK-NEXT: sldi r5, r5, 32
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; CHECK-NEXT: oris r5, r5, 36700
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; CHECK-NEXT: ori r5, r5, 10486
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; CHECK-NEXT: std r5, 0(r4)
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; CHECK-NEXT: addi r1, r1, 112
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; CHECK-NEXT: ld r0, 16(r1)
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; CHECK-NEXT: mtlr r0
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; CHECK-NEXT: blr
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entry:
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%d.addr = alloca double*, align 8
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store double* %d, double** %d.addr, align 8
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%call = call signext i32 (i8*, ...) @printf(i8* getelementptr inbounds ([25 x i8], [25 x i8]* @.str, i64 0, i64 0))
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%0 = load double*, double** %d.addr, align 8
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store double 4.990000e+00, double* %0, align 8
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ret void
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}
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declare signext i32 @printf(i8*, ...)
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; Function Attrs: noinline nounwind optnone
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define internal void @loadGV() #0 {
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; CHECK-LABEL: loadGV:
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; CHECK: .localentry loadGV, 1
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; CHECK-NEXT: # %bb.0: # %entry
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; CHECK-NEXT: mflr r0
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; CHECK-NEXT: std r0, 16(r1)
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; CHECK-NEXT: stdu r1, -112(r1)
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; CHECK-NEXT: paddi r3, 0, .L.str.1@PCREL, 1
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; CHECK-NEXT: bl printf@notoc
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; CHECK-NEXT: pld r4, stdout@got@pcrel(0), 1
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; CHECK-NEXT: ld r4, 0(r4)
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; CHECK-NEXT: li r5, 97
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; CHECK-NEXT: std r3, 104(r1) # 8-byte Folded Spill
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; CHECK-NEXT: mr r3, r5
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; CHECK-NEXT: bl _IO_putc@notoc
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; CHECK-NEXT: addi r1, r1, 112
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; CHECK-NEXT: ld r0, 16(r1)
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; CHECK-NEXT: mtlr r0
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; CHECK-NEXT: blr
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entry:
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%call = call signext i32 (i8*, ...) @printf(i8* getelementptr inbounds ([25 x i8], [25 x i8]* @.str.1, i64 0, i64 0))
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%0 = load %struct._IO_FILE*, %struct._IO_FILE** @stdout, align 8
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%call1 = call signext i32 @_IO_putc(i32 signext 97, %struct._IO_FILE* %0)
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ret void
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}
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declare signext i32 @_IO_putc(i32 signext, %struct._IO_FILE*)
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attributes #0 = { noinline nounwind optnone }
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