e29bb074c6
This patch exploits the xxsplti32dx instruction available on Power10 in place of constant pool loads where xxspltidp would not be able to, usually because the immediate cannot fit into 32 bits. Differential Revision: https://reviews.llvm.org/D95458
185 lines
6.5 KiB
LLVM
185 lines
6.5 KiB
LLVM
; RUN: llc -verify-machineinstrs -mtriple=powerpc64le-unknown-linux-gnu \
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; RUN: -mcpu=pwr10 -ppc-asm-full-reg-names < %s \
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; RUN: | FileCheck %s --check-prefixes=CHECK-S,CHECK-ALL
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; RUN: llc -verify-machineinstrs -target-abi=elfv2 -mtriple=powerpc64-- \
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; RUN: -mcpu=pwr10 -ppc-asm-full-reg-names < %s \
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; RUN: | FileCheck %s --check-prefixes=CHECK-S,CHECK-ALL
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; RUN: llc -verify-machineinstrs -mtriple=powerpc64le-unknown-linux-gnu \
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; RUN: -mcpu=pwr9 -ppc-asm-full-reg-names < %s \
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; RUN: | FileCheck %s --check-prefixes=CHECK-P9,CHECK-ALL
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; RUN: llc -verify-machineinstrs -mtriple=powerpc64le-unknown-linux-gnu \
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; RUN: -mcpu=pwr9 --code-model=large -ppc-asm-full-reg-names < %s \
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; RUN: | FileCheck %s --check-prefixes=CHECK-LARGE,CHECK-ALL
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@global_int = common dso_local local_unnamed_addr global i32 0, align 4
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define dso_local signext i32 @NoTOC() local_unnamed_addr {
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; CHECK-ALL-LABEL: NoTOC:
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; CHECK-S-NOT: .localentry
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; CHECK-S: li r3, 42
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; CHECK-S-NEXT: blr
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entry:
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ret i32 42
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}
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define dso_local signext i32 @AsmClobberX2(i32 signext %a, i32 signext %b) local_unnamed_addr {
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; CHECK-ALL-LABEL: AsmClobberX2:
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; CHECK-S: .localentry AsmClobberX2, 1
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; CHECK-S: add r3, r4, r3
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; CHECK-S: #APP
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; CHECK-S-NEXT: nop
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; CHECK-S-NEXT: #NO_APP
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; CHECK-S: blr
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entry:
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%add = add nsw i32 %b, %a
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tail call void asm sideeffect "nop", "~{r2}"()
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ret i32 %add
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}
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; FIXME: This is actually a test case that shows a bug. On power9 and earlier
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; this test should not compile. On later CPUs (like this test) the @toc
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; should be replaced with @pcrel and we won't need R2 and so the problem
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; goes away.
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define dso_local signext i32 @AsmClobberX2WithTOC(i32 signext %a, i32 signext %b) local_unnamed_addr {
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; CHECK-ALL-LABEL: AsmClobberX2WithTOC:
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; CHECK-LARGE: ld r2, .Lfunc_toc2-.Lfunc_gep2(r12)
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; CHECK-LARGE: add r2, r2, r12
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; CHECK-S: .localentry AsmClobberX2WithTOC
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; CHECK-S: add r3, r4, r3
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; CHECK-S-NEXT: #APP
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; CHECK-S-NEXT: li r2, 0
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; CHECK-S-NEXT: #NO_APP
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; CHECK-S-NEXT: plwz r4, global_int@PCREL(0), 1
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; CHECK-S-NEXT: add r3, r3, r4
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; CHECK-S-NEXT: extsw r3, r3
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; CHECK-S-NEXT: blr
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entry:
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%add = add nsw i32 %b, %a
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tail call void asm sideeffect "li 2, 0", "~{r2}"()
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%0 = load i32, i32* @global_int, align 4
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%add1 = add nsw i32 %add, %0
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ret i32 %add1
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}
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define dso_local signext i32 @AsmClobberX5(i32 signext %a, i32 signext %b) local_unnamed_addr {
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; CHECK-ALL-LABEL: AsmClobberX5:
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; CHECK-S: .localentry AsmClobberX5, 1
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; CHECK-P9-NOT: .localentry
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; CHECK-ALL: # %bb.0: # %entry
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; CHECK-S-NEXT: add r3, r4, r3
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; CHECK-S-NEXT: #APP
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; CHECK-S-NEXT: nop
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; CHECK-S-NEXT: #NO_APP
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; CHECK-S-NEXT: extsw r3, r3
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; CHECK-S-NEXT: blr
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entry:
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%add = add nsw i32 %b, %a
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tail call void asm sideeffect "nop", "~{r5}"()
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ret i32 %add
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}
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; Clobber all GPRs except R2.
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define dso_local signext i32 @AsmClobberNotR2(i32 signext %a, i32 signext %b) local_unnamed_addr {
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; CHECK-ALL-LABEL: AsmClobberNotR2:
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; CHECK-S: .localentry AsmClobberNotR2, 1
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; CHECK-P9-NOT: .localentry
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; CHECK-S: add r3, r4, r3
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; CHECK-S: stw r3, -148(r1) # 4-byte Folded Spill
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; CHECK-S-NEXT: #APP
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; CHECK-S-NEXT: nop
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; CHECK-S-NEXT: #NO_APP
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; CHECK-S-NEXT: lwz r3, -148(r1) # 4-byte Folded Reload
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; CHECK-S: blr
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entry:
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%add = add nsw i32 %b, %a
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tail call void asm sideeffect "nop", "~{r0},~{r1},~{r3},~{r4},~{r5},~{r6},~{r7},~{r8},~{r9},~{r10},~{r11},~{r12},~{r13},~{r14},~{r15},~{r16},~{r17},~{r18},~{r19},~{r20},~{r21},~{r22},~{r23},~{r24},~{r25},~{r26},~{r27},~{r28},~{r29},~{r30},~{r31}"()
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ret i32 %add
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}
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; Increase register pressure enough to force the register allocator to
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; make use of R2.
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define dso_local signext i32 @X2IsCallerSaved(i32 signext %a, i32 signext %b, i32 signext %c, i32 signext %d, i32 signext %e, i32 signext %f, i32 signext %g, i32 signext %h) local_unnamed_addr {
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; CHECK-ALL-LABEL: X2IsCallerSaved:
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; CHECK-S: .localentry X2IsCallerSaved, 1
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; CHECK-P9-NOT: .localentry
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; CHECK-ALL: # %bb.0: # %entry
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; CHECK-S-NEXT: std r29, -24(r1) # 8-byte Folded Spill
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; CHECK-S-NEXT: std r30, -16(r1) # 8-byte Folded Spill
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; CHECK-S-NEXT: add r11, r4, r3
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; CHECK-S-NEXT: sub r29, r8, r9
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; CHECK-S-NEXT: add r9, r10, r9
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; CHECK-S-NEXT: sub r10, r10, r3
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; CHECK-S-NEXT: sub r12, r4, r5
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; CHECK-S-NEXT: add r0, r6, r5
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; CHECK-S-NEXT: sub r2, r6, r7
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; CHECK-S-NEXT: mullw r3, r4, r3
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; CHECK-S-NEXT: add r30, r8, r7
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; CHECK-S-NEXT: mullw r3, r3, r11
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; CHECK-S-NEXT: mullw r3, r3, r5
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; CHECK-S-NEXT: mullw r3, r3, r6
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; CHECK-S-NEXT: mullw r3, r3, r12
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; CHECK-S-NEXT: mullw r3, r3, r0
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; CHECK-S-NEXT: mullw r3, r3, r7
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; CHECK-S-NEXT: mullw r3, r3, r8
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; CHECK-S-NEXT: mullw r3, r3, r2
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; CHECK-S-NEXT: mullw r3, r3, r30
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; CHECK-S-NEXT: ld r30, -16(r1) # 8-byte Folded Reload
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; CHECK-S-NEXT: mullw r3, r3, r29
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; CHECK-S-NEXT: ld r29, -24(r1) # 8-byte Folded Reload
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; CHECK-S-NEXT: mullw r3, r3, r9
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; CHECK-S-NEXT: mullw r3, r3, r10
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; CHECK-S-NEXT: extsw r3, r3
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; CHECK-S-NEXT: blr
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entry:
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%add = add nsw i32 %b, %a
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%sub = sub nsw i32 %b, %c
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%add1 = add nsw i32 %d, %c
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%sub2 = sub nsw i32 %d, %e
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%add3 = add nsw i32 %f, %e
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%sub4 = sub nsw i32 %f, %g
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%add5 = add nsw i32 %h, %g
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%sub6 = sub nsw i32 %h, %a
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%mul = mul i32 %b, %a
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%mul7 = mul i32 %mul, %add
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%mul8 = mul i32 %mul7, %c
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%mul9 = mul i32 %mul8, %d
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%mul10 = mul i32 %mul9, %sub
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%mul11 = mul i32 %mul10, %add1
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%mul12 = mul i32 %mul11, %e
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%mul13 = mul i32 %mul12, %f
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%mul14 = mul i32 %mul13, %sub2
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%mul15 = mul i32 %mul14, %add3
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%mul16 = mul i32 %mul15, %sub4
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%mul17 = mul i32 %mul16, %add5
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%mul18 = mul i32 %mul17, %sub6
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ret i32 %mul18
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}
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define dso_local signext i32 @UsesX2AsTOC() local_unnamed_addr {
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; CHECK-ALL-LABEL: UsesX2AsTOC:
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; CHECK-LARGE: ld r2, .Lfunc_toc6-.Lfunc_gep6(r12)
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; CHECK-LARGE: add r2, r2, r12
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; CHECK-ALL: # %bb.0: # %entry
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entry:
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%0 = load i32, i32* @global_int, align 4
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ret i32 %0
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}
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define dso_local double @UsesX2AsConstPoolTOC() local_unnamed_addr {
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; CHECK-ALL-LABEL: UsesX2AsConstPoolTOC:
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; CHECK-LARGE: ld r2, .Lfunc_toc7-.Lfunc_gep7(r12)
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; CHECK-LARGE: add r2, r2, r12
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; CHECK-S-NOT: .localentry
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; CHECK-ALL: # %bb.0: # %entry
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; CHECK-S-NEXT: xxsplti32dx vs1, 0, 1078011044
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; CHECK-S-NEXT: xxsplti32dx vs1, 1, -337824948
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; CHECK-S-NEXT: # kill: def $f1 killed $f1 killed $vsl1
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; CHECK-S-NEXT: blr
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entry:
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ret double 0x404124A4EBDD334C
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}
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