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llvm-project/llvm/test/CodeGen/ARM/ldstrex.ll

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ARM: implement ldrex, strex and clrex intrinsics Intrinsics already existed for the 64-bit variants, so these support operations of size at most 32-bits. llvm-svn: 186392
2013-07-16 17:46:55 +08:00
; RUN: llc < %s -mtriple=armv7-apple-darwin | FileCheck %s
; RUN: llc < %s -mtriple=thumbv7-apple-darwin > %t
; RUN: FileCheck %s < %t
; RUN: FileCheck %s < %t --check-prefix=CHECK-T2ADDRMODE
%0 = type { i32, i32 }
Update to CodeGen tests to use CHECK-LABEL for labels corresponding to function definitions for more informative error messages. No functionality change. llvm-svn: 186594
2013-07-19 02:35:22 +08:00
; CHECK-LABEL: f0:
ARM: implement ldrex, strex and clrex intrinsics Intrinsics already existed for the 64-bit variants, so these support operations of size at most 32-bits. llvm-svn: 186392
2013-07-16 17:46:55 +08:00
; CHECK: ldrexd
define i64 @f0(i8* %p) nounwind readonly {
entry:
%ldrexd = tail call %0 @llvm.arm.ldrexd(i8* %p)
%0 = extractvalue %0 %ldrexd, 1
%1 = extractvalue %0 %ldrexd, 0
%2 = zext i32 %0 to i64
%3 = zext i32 %1 to i64
%shl = shl nuw i64 %2, 32
%4 = or i64 %shl, %3
ret i64 %4
}
Update to CodeGen tests to use CHECK-LABEL for labels corresponding to function definitions for more informative error messages. No functionality change. llvm-svn: 186594
2013-07-19 02:35:22 +08:00
; CHECK-LABEL: f1:
ARM: implement ldrex, strex and clrex intrinsics Intrinsics already existed for the 64-bit variants, so these support operations of size at most 32-bits. llvm-svn: 186392
2013-07-16 17:46:55 +08:00
; CHECK: strexd
define i32 @f1(i8* %ptr, i64 %val) nounwind {
entry:
%tmp4 = trunc i64 %val to i32
%tmp6 = lshr i64 %val, 32
%tmp7 = trunc i64 %tmp6 to i32
%strexd = tail call i32 @llvm.arm.strexd(i32 %tmp4, i32 %tmp7, i8* %ptr)
ret i32 %strexd
}
declare %0 @llvm.arm.ldrexd(i8*) nounwind readonly
declare i32 @llvm.arm.strexd(i32, i32, i8*) nounwind
Update to CodeGen tests to use CHECK-LABEL for labels corresponding to function definitions for more informative error messages. No functionality change. llvm-svn: 186594
2013-07-19 02:35:22 +08:00
; CHECK-LABEL: test_load_i8:
ARM: implement ldrex, strex and clrex intrinsics Intrinsics already existed for the 64-bit variants, so these support operations of size at most 32-bits. llvm-svn: 186392
2013-07-16 17:46:55 +08:00
; CHECK: ldrexb r0, [r0]
; CHECK-NOT: uxtb
ARM: tell LLVM about zext properties of ldrexb/ldrexh Implementing this via ComputeMaskedBits has two advantages: + It actually works. DAGISel doesn't deal with the chains properly in the previous pattern-based solution, so they never trigger. + The information can be used in other DAG combines, as well as the trivial "get rid of truncs". For example if the trunc is in a different basic block. rdar://problem/16227836 llvm-svn: 205540
2014-04-03 23:10:35 +08:00
; CHECK-NOT: and
define zeroext i8 @test_load_i8(i8* %addr) {
ARM: implement ldrex, strex and clrex intrinsics Intrinsics already existed for the 64-bit variants, so these support operations of size at most 32-bits. llvm-svn: 186392
2013-07-16 17:46:55 +08:00
%val = call i32 @llvm.arm.ldrex.p0i8(i8* %addr)
ARM: tell LLVM about zext properties of ldrexb/ldrexh Implementing this via ComputeMaskedBits has two advantages: + It actually works. DAGISel doesn't deal with the chains properly in the previous pattern-based solution, so they never trigger. + The information can be used in other DAG combines, as well as the trivial "get rid of truncs". For example if the trunc is in a different basic block. rdar://problem/16227836 llvm-svn: 205540
2014-04-03 23:10:35 +08:00
%val8 = trunc i32 %val to i8
ret i8 %val8
ARM: implement ldrex, strex and clrex intrinsics Intrinsics already existed for the 64-bit variants, so these support operations of size at most 32-bits. llvm-svn: 186392
2013-07-16 17:46:55 +08:00
}
Update to CodeGen tests to use CHECK-LABEL for labels corresponding to function definitions for more informative error messages. No functionality change. llvm-svn: 186594
2013-07-19 02:35:22 +08:00
; CHECK-LABEL: test_load_i16:
ARM: implement ldrex, strex and clrex intrinsics Intrinsics already existed for the 64-bit variants, so these support operations of size at most 32-bits. llvm-svn: 186392
2013-07-16 17:46:55 +08:00
; CHECK: ldrexh r0, [r0]
; CHECK-NOT: uxth
ARM: tell LLVM about zext properties of ldrexb/ldrexh Implementing this via ComputeMaskedBits has two advantages: + It actually works. DAGISel doesn't deal with the chains properly in the previous pattern-based solution, so they never trigger. + The information can be used in other DAG combines, as well as the trivial "get rid of truncs". For example if the trunc is in a different basic block. rdar://problem/16227836 llvm-svn: 205540
2014-04-03 23:10:35 +08:00
; CHECK-NOT: and
define zeroext i16 @test_load_i16(i16* %addr) {
ARM: implement ldrex, strex and clrex intrinsics Intrinsics already existed for the 64-bit variants, so these support operations of size at most 32-bits. llvm-svn: 186392
2013-07-16 17:46:55 +08:00
%val = call i32 @llvm.arm.ldrex.p0i16(i16* %addr)
ARM: tell LLVM about zext properties of ldrexb/ldrexh Implementing this via ComputeMaskedBits has two advantages: + It actually works. DAGISel doesn't deal with the chains properly in the previous pattern-based solution, so they never trigger. + The information can be used in other DAG combines, as well as the trivial "get rid of truncs". For example if the trunc is in a different basic block. rdar://problem/16227836 llvm-svn: 205540
2014-04-03 23:10:35 +08:00
%val16 = trunc i32 %val to i16
ret i16 %val16
ARM: implement ldrex, strex and clrex intrinsics Intrinsics already existed for the 64-bit variants, so these support operations of size at most 32-bits. llvm-svn: 186392
2013-07-16 17:46:55 +08:00
}
Update to CodeGen tests to use CHECK-LABEL for labels corresponding to function definitions for more informative error messages. No functionality change. llvm-svn: 186594
2013-07-19 02:35:22 +08:00
; CHECK-LABEL: test_load_i32:
ARM: implement ldrex, strex and clrex intrinsics Intrinsics already existed for the 64-bit variants, so these support operations of size at most 32-bits. llvm-svn: 186392
2013-07-16 17:46:55 +08:00
; CHECK: ldrex r0, [r0]
define i32 @test_load_i32(i32* %addr) {
%val = call i32 @llvm.arm.ldrex.p0i32(i32* %addr)
ret i32 %val
}
declare i32 @llvm.arm.ldrex.p0i8(i8*) nounwind readonly
declare i32 @llvm.arm.ldrex.p0i16(i16*) nounwind readonly
declare i32 @llvm.arm.ldrex.p0i32(i32*) nounwind readonly
Update to CodeGen tests to use CHECK-LABEL for labels corresponding to function definitions for more informative error messages. No functionality change. llvm-svn: 186594
2013-07-19 02:35:22 +08:00
; CHECK-LABEL: test_store_i8:
ARM: implement ldrex, strex and clrex intrinsics Intrinsics already existed for the 64-bit variants, so these support operations of size at most 32-bits. llvm-svn: 186392
2013-07-16 17:46:55 +08:00
; CHECK-NOT: uxtb
; CHECK: strexb r0, r1, [r2]
define i32 @test_store_i8(i32, i8 %val, i8* %addr) {
%extval = zext i8 %val to i32
%res = call i32 @llvm.arm.strex.p0i8(i32 %extval, i8* %addr)
ret i32 %res
}
Update to CodeGen tests to use CHECK-LABEL for labels corresponding to function definitions for more informative error messages. No functionality change. llvm-svn: 186594
2013-07-19 02:35:22 +08:00
; CHECK-LABEL: test_store_i16:
ARM: implement ldrex, strex and clrex intrinsics Intrinsics already existed for the 64-bit variants, so these support operations of size at most 32-bits. llvm-svn: 186392
2013-07-16 17:46:55 +08:00
; CHECK-NOT: uxth
; CHECK: strexh r0, r1, [r2]
define i32 @test_store_i16(i32, i16 %val, i16* %addr) {
%extval = zext i16 %val to i32
%res = call i32 @llvm.arm.strex.p0i16(i32 %extval, i16* %addr)
ret i32 %res
}
Update to CodeGen tests to use CHECK-LABEL for labels corresponding to function definitions for more informative error messages. No functionality change. llvm-svn: 186594
2013-07-19 02:35:22 +08:00
; CHECK-LABEL: test_store_i32:
ARM: implement ldrex, strex and clrex intrinsics Intrinsics already existed for the 64-bit variants, so these support operations of size at most 32-bits. llvm-svn: 186392
2013-07-16 17:46:55 +08:00
; CHECK: strex r0, r1, [r2]
define i32 @test_store_i32(i32, i32 %val, i32* %addr) {
%res = call i32 @llvm.arm.strex.p0i32(i32 %val, i32* %addr)
ret i32 %res
}
declare i32 @llvm.arm.strex.p0i8(i32, i8*) nounwind
declare i32 @llvm.arm.strex.p0i16(i32, i16*) nounwind
declare i32 @llvm.arm.strex.p0i32(i32, i32*) nounwind
Update to CodeGen tests to use CHECK-LABEL for labels corresponding to function definitions for more informative error messages. No functionality change. llvm-svn: 186594
2013-07-19 02:35:22 +08:00
; CHECK-LABEL: test_clear:
ARM: implement ldrex, strex and clrex intrinsics Intrinsics already existed for the 64-bit variants, so these support operations of size at most 32-bits. llvm-svn: 186392
2013-07-16 17:46:55 +08:00
; CHECK: clrex
define void @test_clear() {
call void @llvm.arm.clrex()
ret void
}
declare void @llvm.arm.clrex() nounwind
@base = global i32* null
define void @excl_addrmode() {
Update to CodeGen tests to use CHECK-LABEL for labels corresponding to function definitions for more informative error messages. No functionality change. llvm-svn: 186594
2013-07-19 02:35:22 +08:00
; CHECK-T2ADDRMODE-LABEL: excl_addrmode:
ARM: implement ldrex, strex and clrex intrinsics Intrinsics already existed for the 64-bit variants, so these support operations of size at most 32-bits. llvm-svn: 186392
2013-07-16 17:46:55 +08:00
%base1020 = load i32** @base
[opaque pointer type] Add textual IR support for explicit type parameter to getelementptr instruction One of several parallel first steps to remove the target type of pointers, replacing them with a single opaque pointer type. This adds an explicit type parameter to the gep instruction so that when the first parameter becomes an opaque pointer type, the type to gep through is still available to the instructions. * This doesn't modify gep operators, only instructions (operators will be handled separately) * Textual IR changes only. Bitcode (including upgrade) and changing the in-memory representation will be in separate changes. * geps of vectors are transformed as: getelementptr <4 x float*> %x, ... ->getelementptr float, <4 x float*> %x, ... Then, once the opaque pointer type is introduced, this will ultimately look like: getelementptr float, <4 x ptr> %x with the unambiguous interpretation that it is a vector of pointers to float. * address spaces remain on the pointer, not the type: getelementptr float addrspace(1)* %x ->getelementptr float, float addrspace(1)* %x Then, eventually: getelementptr float, ptr addrspace(1) %x Importantly, the massive amount of test case churn has been automated by same crappy python code. I had to manually update a few test cases that wouldn't fit the script's model (r228970,r229196,r229197,r229198). The python script just massages stdin and writes the result to stdout, I then wrapped that in a shell script to handle replacing files, then using the usual find+xargs to migrate all the files. update.py: import fileinput import sys import re ibrep = re.compile(r"(^.*?[^%\w]getelementptr inbounds )(((?:<\d* x )?)(.*?)(| addrspace\(\d\)) *\*(|>)(?:$| *(?:%|@|null|undef|blockaddress|getelementptr|addrspacecast|bitcast|inttoptr|\[\[[a-zA-Z]|\{\{).*$))") normrep = re.compile( r"(^.*?[^%\w]getelementptr )(((?:<\d* x )?)(.*?)(| addrspace\(\d\)) *\*(|>)(?:$| *(?:%|@|null|undef|blockaddress|getelementptr|addrspacecast|bitcast|inttoptr|\[\[[a-zA-Z]|\{\{).*$))") def conv(match, line): if not match: return line line = match.groups()[0] if len(match.groups()[5]) == 0: line += match.groups()[2] line += match.groups()[3] line += ", " line += match.groups()[1] line += "\n" return line for line in sys.stdin: if line.find("getelementptr ") == line.find("getelementptr inbounds"): if line.find("getelementptr inbounds") != line.find("getelementptr inbounds ("): line = conv(re.match(ibrep, line), line) elif line.find("getelementptr ") != line.find("getelementptr ("): line = conv(re.match(normrep, line), line) sys.stdout.write(line) apply.sh: for name in "$@" do python3 `dirname "$0"`/update.py < "$name" > "$name.tmp" && mv "$name.tmp" "$name" rm -f "$name.tmp" done The actual commands: From llvm/src: find test/ -name *.ll | xargs ./apply.sh From llvm/src/tools/clang: find test/ -name *.mm -o -name *.m -o -name *.cpp -o -name *.c | xargs -I '{}' ../../apply.sh "{}" From llvm/src/tools/polly: find test/ -name *.ll | xargs ./apply.sh After that, check-all (with llvm, clang, clang-tools-extra, lld, compiler-rt, and polly all checked out). The extra 'rm' in the apply.sh script is due to a few files in clang's test suite using interesting unicode stuff that my python script was throwing exceptions on. None of those files needed to be migrated, so it seemed sufficient to ignore those cases. Reviewers: rafael, dexonsmith, grosser Differential Revision: http://reviews.llvm.org/D7636 llvm-svn: 230786
2015-02-28 03:29:02 +08:00
%offset1020 = getelementptr i32, i32* %base1020, i32 255
ARM: implement ldrex, strex and clrex intrinsics Intrinsics already existed for the 64-bit variants, so these support operations of size at most 32-bits. llvm-svn: 186392
2013-07-16 17:46:55 +08:00
call i32 @llvm.arm.ldrex.p0i32(i32* %offset1020)
call i32 @llvm.arm.strex.p0i32(i32 0, i32* %offset1020)
; CHECK-T2ADDRMODE: ldrex {{r[0-9]+}}, [{{r[0-9]+}}, #1020]
; CHECK-T2ADDRMODE: strex {{r[0-9]+}}, {{r[0-9]+}}, [{{r[0-9]+}}, #1020]
%base1024 = load i32** @base
[opaque pointer type] Add textual IR support for explicit type parameter to getelementptr instruction One of several parallel first steps to remove the target type of pointers, replacing them with a single opaque pointer type. This adds an explicit type parameter to the gep instruction so that when the first parameter becomes an opaque pointer type, the type to gep through is still available to the instructions. * This doesn't modify gep operators, only instructions (operators will be handled separately) * Textual IR changes only. Bitcode (including upgrade) and changing the in-memory representation will be in separate changes. * geps of vectors are transformed as: getelementptr <4 x float*> %x, ... ->getelementptr float, <4 x float*> %x, ... Then, once the opaque pointer type is introduced, this will ultimately look like: getelementptr float, <4 x ptr> %x with the unambiguous interpretation that it is a vector of pointers to float. * address spaces remain on the pointer, not the type: getelementptr float addrspace(1)* %x ->getelementptr float, float addrspace(1)* %x Then, eventually: getelementptr float, ptr addrspace(1) %x Importantly, the massive amount of test case churn has been automated by same crappy python code. I had to manually update a few test cases that wouldn't fit the script's model (r228970,r229196,r229197,r229198). The python script just massages stdin and writes the result to stdout, I then wrapped that in a shell script to handle replacing files, then using the usual find+xargs to migrate all the files. update.py: import fileinput import sys import re ibrep = re.compile(r"(^.*?[^%\w]getelementptr inbounds )(((?:<\d* x )?)(.*?)(| addrspace\(\d\)) *\*(|>)(?:$| *(?:%|@|null|undef|blockaddress|getelementptr|addrspacecast|bitcast|inttoptr|\[\[[a-zA-Z]|\{\{).*$))") normrep = re.compile( r"(^.*?[^%\w]getelementptr )(((?:<\d* x )?)(.*?)(| addrspace\(\d\)) *\*(|>)(?:$| *(?:%|@|null|undef|blockaddress|getelementptr|addrspacecast|bitcast|inttoptr|\[\[[a-zA-Z]|\{\{).*$))") def conv(match, line): if not match: return line line = match.groups()[0] if len(match.groups()[5]) == 0: line += match.groups()[2] line += match.groups()[3] line += ", " line += match.groups()[1] line += "\n" return line for line in sys.stdin: if line.find("getelementptr ") == line.find("getelementptr inbounds"): if line.find("getelementptr inbounds") != line.find("getelementptr inbounds ("): line = conv(re.match(ibrep, line), line) elif line.find("getelementptr ") != line.find("getelementptr ("): line = conv(re.match(normrep, line), line) sys.stdout.write(line) apply.sh: for name in "$@" do python3 `dirname "$0"`/update.py < "$name" > "$name.tmp" && mv "$name.tmp" "$name" rm -f "$name.tmp" done The actual commands: From llvm/src: find test/ -name *.ll | xargs ./apply.sh From llvm/src/tools/clang: find test/ -name *.mm -o -name *.m -o -name *.cpp -o -name *.c | xargs -I '{}' ../../apply.sh "{}" From llvm/src/tools/polly: find test/ -name *.ll | xargs ./apply.sh After that, check-all (with llvm, clang, clang-tools-extra, lld, compiler-rt, and polly all checked out). The extra 'rm' in the apply.sh script is due to a few files in clang's test suite using interesting unicode stuff that my python script was throwing exceptions on. None of those files needed to be migrated, so it seemed sufficient to ignore those cases. Reviewers: rafael, dexonsmith, grosser Differential Revision: http://reviews.llvm.org/D7636 llvm-svn: 230786
2015-02-28 03:29:02 +08:00
%offset1024 = getelementptr i32, i32* %base1024, i32 256
ARM: implement ldrex, strex and clrex intrinsics Intrinsics already existed for the 64-bit variants, so these support operations of size at most 32-bits. llvm-svn: 186392
2013-07-16 17:46:55 +08:00
call i32 @llvm.arm.ldrex.p0i32(i32* %offset1024)
call i32 @llvm.arm.strex.p0i32(i32 0, i32* %offset1024)
; CHECK-T2ADDRMODE: add.w r[[ADDR:[0-9]+]], {{r[0-9]+}}, #1024
; CHECK-T2ADDRMODE: ldrex {{r[0-9]+}}, [r[[ADDR]]]
; CHECK-T2ADDRMODE: strex {{r[0-9]+}}, {{r[0-9]+}}, [r[[ADDR]]]
%base1 = load i32** @base
%addr8 = bitcast i32* %base1 to i8*
[opaque pointer type] Add textual IR support for explicit type parameter to getelementptr instruction One of several parallel first steps to remove the target type of pointers, replacing them with a single opaque pointer type. This adds an explicit type parameter to the gep instruction so that when the first parameter becomes an opaque pointer type, the type to gep through is still available to the instructions. * This doesn't modify gep operators, only instructions (operators will be handled separately) * Textual IR changes only. Bitcode (including upgrade) and changing the in-memory representation will be in separate changes. * geps of vectors are transformed as: getelementptr <4 x float*> %x, ... ->getelementptr float, <4 x float*> %x, ... Then, once the opaque pointer type is introduced, this will ultimately look like: getelementptr float, <4 x ptr> %x with the unambiguous interpretation that it is a vector of pointers to float. * address spaces remain on the pointer, not the type: getelementptr float addrspace(1)* %x ->getelementptr float, float addrspace(1)* %x Then, eventually: getelementptr float, ptr addrspace(1) %x Importantly, the massive amount of test case churn has been automated by same crappy python code. I had to manually update a few test cases that wouldn't fit the script's model (r228970,r229196,r229197,r229198). The python script just massages stdin and writes the result to stdout, I then wrapped that in a shell script to handle replacing files, then using the usual find+xargs to migrate all the files. update.py: import fileinput import sys import re ibrep = re.compile(r"(^.*?[^%\w]getelementptr inbounds )(((?:<\d* x )?)(.*?)(| addrspace\(\d\)) *\*(|>)(?:$| *(?:%|@|null|undef|blockaddress|getelementptr|addrspacecast|bitcast|inttoptr|\[\[[a-zA-Z]|\{\{).*$))") normrep = re.compile( r"(^.*?[^%\w]getelementptr )(((?:<\d* x )?)(.*?)(| addrspace\(\d\)) *\*(|>)(?:$| *(?:%|@|null|undef|blockaddress|getelementptr|addrspacecast|bitcast|inttoptr|\[\[[a-zA-Z]|\{\{).*$))") def conv(match, line): if not match: return line line = match.groups()[0] if len(match.groups()[5]) == 0: line += match.groups()[2] line += match.groups()[3] line += ", " line += match.groups()[1] line += "\n" return line for line in sys.stdin: if line.find("getelementptr ") == line.find("getelementptr inbounds"): if line.find("getelementptr inbounds") != line.find("getelementptr inbounds ("): line = conv(re.match(ibrep, line), line) elif line.find("getelementptr ") != line.find("getelementptr ("): line = conv(re.match(normrep, line), line) sys.stdout.write(line) apply.sh: for name in "$@" do python3 `dirname "$0"`/update.py < "$name" > "$name.tmp" && mv "$name.tmp" "$name" rm -f "$name.tmp" done The actual commands: From llvm/src: find test/ -name *.ll | xargs ./apply.sh From llvm/src/tools/clang: find test/ -name *.mm -o -name *.m -o -name *.cpp -o -name *.c | xargs -I '{}' ../../apply.sh "{}" From llvm/src/tools/polly: find test/ -name *.ll | xargs ./apply.sh After that, check-all (with llvm, clang, clang-tools-extra, lld, compiler-rt, and polly all checked out). The extra 'rm' in the apply.sh script is due to a few files in clang's test suite using interesting unicode stuff that my python script was throwing exceptions on. None of those files needed to be migrated, so it seemed sufficient to ignore those cases. Reviewers: rafael, dexonsmith, grosser Differential Revision: http://reviews.llvm.org/D7636 llvm-svn: 230786
2015-02-28 03:29:02 +08:00
%offset1_8 = getelementptr i8, i8* %addr8, i32 1
ARM: implement ldrex, strex and clrex intrinsics Intrinsics already existed for the 64-bit variants, so these support operations of size at most 32-bits. llvm-svn: 186392
2013-07-16 17:46:55 +08:00
%offset1 = bitcast i8* %offset1_8 to i32*
call i32 @llvm.arm.ldrex.p0i32(i32* %offset1)
call i32 @llvm.arm.strex.p0i32(i32 0, i32* %offset1)
; CHECK-T2ADDRMODE: adds r[[ADDR:[0-9]+]], #1
; CHECK-T2ADDRMODE: ldrex {{r[0-9]+}}, [r[[ADDR]]]
; CHECK-T2ADDRMODE: strex {{r[0-9]+}}, {{r[0-9]+}}, [r[[ADDR]]]
%local = alloca i8, i32 1024
%local32 = bitcast i8* %local to i32*
call i32 @llvm.arm.ldrex.p0i32(i32* %local32)
call i32 @llvm.arm.strex.p0i32(i32 0, i32* %local32)
; CHECK-T2ADDRMODE: mov r[[ADDR:[0-9]+]], sp
; CHECK-T2ADDRMODE: ldrex {{r[0-9]+}}, [r[[ADDR]]]
; CHECK-T2ADDRMODE: strex {{r[0-9]+}}, {{r[0-9]+}}, [r[[ADDR]]]
ret void
}
ARM: tell LLVM about zext properties of ldrexb/ldrexh Implementing this via ComputeMaskedBits has two advantages: + It actually works. DAGISel doesn't deal with the chains properly in the previous pattern-based solution, so they never trigger. + The information can be used in other DAG combines, as well as the trivial "get rid of truncs". For example if the trunc is in a different basic block. rdar://problem/16227836 llvm-svn: 205540
2014-04-03 23:10:35 +08:00
; LLVM should know, even across basic blocks, that ldrex is setting the high
; bits of its i32 to 0. There should be no zero-extend operation.
define zeroext i8 @test_cross_block_zext_i8(i1 %tst, i8* %addr) {
; CHECK: test_cross_block_zext_i8:
; CHECK-NOT: uxtb
; CHECK-NOT: and
; CHECK: bx lr
%val = call i32 @llvm.arm.ldrex.p0i8(i8* %addr)
br i1 %tst, label %end, label %mid
mid:
ret i8 42
end:
%val8 = trunc i32 %val to i8
ret i8 %val8
}