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1ba442ae80
When a large "irregular" (e.g. i96) integer call argument is converted to indirect, 64-bit parts are stored to the stack. The full stack space (e.g. i128) was not allocated prior to this patch, but rather just the exact space of the original type. This caused neighboring values on the stack to be overwritten. Thanks to Josh Stone for reporting this. Review: Ulrich Weigand Fixes https://bugs.llvm.org/show_bug.cgi?id=49322 Differential Revision: https://reviews.llvm.org/D97514
55 lines
1.6 KiB
LLVM
55 lines
1.6 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; Test outgoing promoted arguments that are split (and passed by reference).
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;
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; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
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; The i96 arg is promoted to i128 and should get the full stack space.
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declare void @fn1(i96)
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define i32 @fn2() {
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; CHECK-LABEL: fn2:
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; CHECK: # %bb.0:
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; CHECK-NEXT: stmg %r14, %r15, 112(%r15)
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; CHECK-NEXT: .cfi_offset %r14, -48
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; CHECK-NEXT: .cfi_offset %r15, -40
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; CHECK-NEXT: aghi %r15, -184
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; CHECK-NEXT: .cfi_def_cfa_offset 344
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; CHECK-NEXT: mvhi 180(%r15), -1
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; CHECK-NEXT: mvghi 168(%r15), 0
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; CHECK-NEXT: la %r2, 160(%r15)
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; CHECK-NEXT: mvghi 160(%r15), 0
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; CHECK-NEXT: brasl %r14, fn1@PLT
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; CHECK-NEXT: l %r2, 180(%r15)
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; CHECK-NEXT: lmg %r14, %r15, 296(%r15)
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; CHECK-NEXT: br %r14
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%1 = alloca i32
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store i32 -1, i32* %1
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call void @fn1(i96 0)
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%2 = load i32, i32* %1
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ret i32 %2
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}
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declare void @fn3(i136)
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define i32 @fn4() {
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; CHECK-LABEL: fn4:
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; CHECK: # %bb.0:
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; CHECK-NEXT: stmg %r14, %r15, 112(%r15)
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; CHECK-NEXT: .cfi_offset %r14, -48
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; CHECK-NEXT: .cfi_offset %r15, -40
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; CHECK-NEXT: aghi %r15, -192
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; CHECK-NEXT: .cfi_def_cfa_offset 352
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; CHECK-NEXT: mvhi 188(%r15), -1
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; CHECK-NEXT: mvghi 176(%r15), 0
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; CHECK-NEXT: mvghi 168(%r15), 0
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; CHECK-NEXT: la %r2, 160(%r15)
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; CHECK-NEXT: mvghi 160(%r15), 0
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; CHECK-NEXT: brasl %r14, fn3@PLT
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; CHECK-NEXT: l %r2, 188(%r15)
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; CHECK-NEXT: lmg %r14, %r15, 304(%r15)
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; CHECK-NEXT: br %r14
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%1 = alloca i32
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store i32 -1, i32* %1
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call void @fn3(i136 0)
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%2 = load i32, i32* %1
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ret i32 %2
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}
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